diff --git a/code/modules/mob/living/carbon/human/human_organs.dm b/code/modules/mob/living/carbon/human/human_organs.dm
index 678969ac096..96a23acf5c7 100644
--- a/code/modules/mob/living/carbon/human/human_organs.dm
+++ b/code/modules/mob/living/carbon/human/human_organs.dm
@@ -137,6 +137,36 @@
 			spawn(10)
 				qdel(spark_system)
 
+/mob/living/carbon/human/proc/becomeSlim()
+	to_chat(src, "<span class='notice'>You feel fit again!</span>")
+	var/obj/item/organ/external/chest/C = get_organ("chest")
+	if(istype(C))
+		C.makeSlim(0)
+	else
+		to_chat(src, "Err, well, you *would*, but you don't have a torso. Yell at a coder.")
+		log_debug("[src] at ([x],[y],[z]) doesn't have a torso.")
+	mutations.Remove(FAT)
+	update_mutantrace(0)
+	update_mutations(0)
+	update_body(0)
+	update_inv_w_uniform(0)
+	update_inv_wear_suit()
+
+/mob/living/carbon/human/proc/becomeFat()
+	to_chat(src, "<span class='alert'>You suddenly feel blubbery!</span>")
+	var/obj/item/organ/external/chest/C = get_organ("chest")
+	if(istype(C))
+		C.makeFat()
+	else
+		to_chat(src, "Err, well, you *would*, but you don't have a torso. Yell at a coder.")
+		log_debug("[src] at ([x],[y],[z]) doesn't have a torso.")
+	mutations.Add(FAT)
+	update_mutantrace(0)
+	update_mutations(0)
+	update_body(0)
+	update_inv_w_uniform(0)
+	update_inv_wear_suit()
+
 //Handles chem traces
 /mob/living/carbon/human/proc/handle_trace_chems()
 	//New are added for reagents to random organs.
@@ -166,4 +196,4 @@ I use this to standardize shadowling dethrall code
 	if(!get_int_organ(organ_name))
 		return null
 	var/obj/item/organ/internal/O = get_int_organ(organ_name)
-	return O.parent_organ
\ No newline at end of file
+	return O.parent_organ
diff --git a/code/modules/mob/living/carbon/human/life.dm b/code/modules/mob/living/carbon/human/life.dm
index 6e74c90f08c..8951b21bc74 100644
--- a/code/modules/mob/living/carbon/human/life.dm
+++ b/code/modules/mob/living/carbon/human/life.dm
@@ -675,20 +675,10 @@
 	if(species.flags & CAN_BE_FAT)
 		if(FAT in mutations)
 			if(overeatduration < 100)
-				to_chat(src, "<span class='notice'>You feel fit again!</span>")
-				mutations.Remove(FAT)
-				update_mutantrace(0)
-				update_mutations(0)
-				update_inv_w_uniform(0)
-				update_inv_wear_suit()
+				becomeSlim()
 		else
 			if(overeatduration > 500)
-				to_chat(src, "<span class='alert'>You suddenly feel blubbery!</span>")
-				mutations.Add(FAT)
-				update_mutantrace(0)
-				update_mutations(0)
-				update_inv_w_uniform(0)
-				update_inv_wear_suit()
+				becomeFat()
 
 	// nutrition decrease
 	if(nutrition > 0 && stat != 2)
diff --git a/code/modules/surgery/organs/organ_icon.dm b/code/modules/surgery/organs/organ_icon.dm
index aed8fcf4f81..31ef55f4919 100644
--- a/code/modules/surgery/organs/organ_icon.dm
+++ b/code/modules/surgery/organs/organ_icon.dm
@@ -49,6 +49,38 @@ var/global/list/limb_icon_cache = list()
 	get_icon()
 	. = ..()
 
+/obj/item/organ/external/proc/get_icon(skeletal, fat)
+	// Kasparrov, you monster
+	if(istext(species))
+		species = all_species[species]
+	if(force_icon)
+		mob_icon = new /icon(force_icon, "[icon_name]")
+		if(species && species.name == "Machine") //snowflake for IPC's, sorry.
+			if(s_col && s_col.len >= 3)
+				mob_icon.Blend(rgb(s_col[1], s_col[2], s_col[3]), ICON_ADD)
+	else
+		var/new_icons = get_icon_state(skeletal)
+		var/icon_file = new_icons[1]
+		var/new_icon_state = new_icons[2]
+		mob_icon = new /icon(icon_file, new_icon_state)
+		if(!skeletal && !(status & ORGAN_ROBOT))
+			if(status & ORGAN_DEAD)
+				mob_icon.ColorTone(rgb(10,50,0))
+				mob_icon.SetIntensity(0.7)
+
+			if(!isnull(s_tone))
+				if(s_tone >= 0)
+					mob_icon.Blend(rgb(s_tone, s_tone, s_tone), ICON_ADD)
+				else
+					mob_icon.Blend(rgb(-s_tone,  -s_tone,  -s_tone), ICON_SUBTRACT)
+			else if(s_col && s_col.len >= 3)
+				mob_icon.Blend(rgb(s_col[1], s_col[2], s_col[3]), ICON_ADD)
+
+	dir = EAST
+	icon = mob_icon
+
+	return mob_icon
+
 /obj/item/organ/external/head/get_icon()
 
 	..()
@@ -113,51 +145,39 @@ var/global/list/limb_icon_cache = list()
 
 	return mob_icon
 
-/obj/item/organ/external/proc/get_icon(var/skeletal)
+/obj/item/organ/external/proc/get_icon_state(skeletal)
 	var/gender
-	if(istext(species))
-		species = all_species[species]
-	if(force_icon)
-		mob_icon = new /icon(force_icon, "[icon_name]")
-		if(species && species.name == "Machine") //snowflake for IPC's, sorry.
-			if(s_col && s_col.len >= 3)
-				mob_icon.Blend(rgb(s_col[1], s_col[2], s_col[3]), ICON_ADD)
+	var/icon_file
+	var/new_icon_state
+	if(!dna)
+		icon_file = 'icons/mob/human_races/r_human.dmi'
+		new_icon_state = "[icon_name][gendered_icon ? "_f" : ""]"
 	else
-		if(!dna)
-			mob_icon = new /icon('icons/mob/human_races/r_human.dmi', "[icon_name][gendered_icon ? "_f" : ""]")
-		else
-			if(gendered_icon)
-				if(dna.GetUIState(DNA_UI_GENDER))
-					gender = "f"
-				else
-					gender = "m"
-
-			if(skeletal)
-				mob_icon = new /icon('icons/mob/human_races/r_skeleton.dmi', "[icon_name][gender ? "_[gender]" : ""]")
-			else if(status & ORGAN_ROBOT)
-				mob_icon = new /icon('icons/mob/human_races/robotic.dmi', "[icon_name][gender ? "_[gender]" : ""]")
+		if(gendered_icon)
+			if(dna.GetUIState(DNA_UI_GENDER))
+				gender = "f"
 			else
-				if(status & ORGAN_MUTATED)
-					mob_icon = new /icon(species.deform, "[icon_name][gender ? "_[gender]" : ""]")
-				else
-					mob_icon = new /icon(species.icobase, "[icon_name][gender ? "_[gender]" : ""]")
+				gender = "m"
+		new_icon_state = "[icon_name][gender ? "_[gender]" : ""]"
 
-				if(status & ORGAN_DEAD)
-					mob_icon.ColorTone(rgb(10,50,0))
-					mob_icon.SetIntensity(0.7)
+		if(skeletal)
+			icon_file = 'icons/mob/human_races/r_skeleton.dmi'
+		else if(status & ORGAN_ROBOT)
+			icon_file = 'icons/mob/human_races/robotic.dmi'
+		else
+			if(status & ORGAN_MUTATED)
+				icon_file = species.deform
+			else
+				// Congratulations, you are normal
+				icon_file = species.icobase
+	return list(icon_file, new_icon_state)
 
-				if(!isnull(s_tone))
-					if(s_tone >= 0)
-						mob_icon.Blend(rgb(s_tone, s_tone, s_tone), ICON_ADD)
-					else
-						mob_icon.Blend(rgb(-s_tone,  -s_tone,  -s_tone), ICON_SUBTRACT)
-				else if(s_col && s_col.len >= 3)
-					mob_icon.Blend(rgb(s_col[1], s_col[2], s_col[3]), ICON_ADD)
+/obj/item/organ/external/chest/get_icon_state(skeletal)
+	var/result = ..()
+	if(fat && !skeletal && !(status & ORGAN_ROBOT) && (species.flags & CAN_BE_FAT))
+		result[2] += "_fat"
+	return result
 
-	dir = EAST
-	icon = mob_icon
-
-	return mob_icon
 
 // new damage icon system
 // adjusted to set damage_state to brute/burn code only (without r_name0 as before)
diff --git a/code/modules/surgery/organs/subtypes/standard.dm b/code/modules/surgery/organs/subtypes/standard.dm
index 1ed651e1e6a..02351f523a8 100644
--- a/code/modules/surgery/organs/subtypes/standard.dm
+++ b/code/modules/surgery/organs/subtypes/standard.dm
@@ -16,6 +16,25 @@
 	cannot_amputate = 1
 	parent_organ = null
 	encased = "ribcage"
+	var/fat = FALSE
+
+/obj/item/organ/external/chest/proc/makeFat(update_body_icon = 1)
+	fat = TRUE
+	if(owner)
+		owner.update_body(update_body_icon)
+	else
+		// get_icon updates the sprite icon, update_icon updates the injuries overlay.
+		// Madness.
+		get_icon()
+
+/obj/item/organ/external/chest/proc/makeSlim(update_body_icon = 1)
+	fat = FALSE
+	if(owner)
+		owner.update_body(update_body_icon)
+	else
+		// get_icon updates the sprite icon, update_icon updates the injuries overlay.
+		// Madness.
+		get_icon()
 
 /obj/item/organ/external/groin
 	name = "lower body"