Their

code/modules/admin/verbs/debug.dm

@@ -266,7 +266,7 @@ But you can call procs that are of type /mob/living/carbon/human/proc/ for that
 	if(!choice)
 		return 0
 	if(!istype(choice, /mob/dead/observer))
-		var/confirm = input("[choice.key] isn't ghosting right now. Are you sure you want to yank him out of them out of their body and place them in this pAI?", "Spawn pAI Confirmation", "No") in list("Yes", "No")
+		var/confirm = input("[choice.key] isn't ghosting right now. Are you sure you want to yank [choice.p_them()] out of [choice.p_their()] body and place [choice.p_them()] in this pAI?", "Spawn pAI Confirmation", "No") in list("Yes", "No")
 		if(confirm != "Yes")
 			return 0
 	var/obj/item/paicard/card = new(T)

code/modules/assembly/mousetrap.dm

@@ -75,7 +75,7 @@
 				if(!user.hand)
 					which_hand = "r_hand"
 				triggered(user, which_hand)
-				user.visible_message("<span class='warning'>[user] accidentally sets off [src], breaking their fingers.</span>", \
+				user.visible_message("<span class='warning'>[user] accidentally sets off [src], breaking [user.p_their()] fingers.</span>", \
 									 "<span class='warning'>You accidentally trigger [src]!</span>")
 				return
 			to_chat(user, "<span class='notice'>You disarm [src].</span>")
@@ -91,7 +91,7 @@
 				if(!user.hand)
 					which_hand = "r_hand"
 				triggered(user, which_hand)
-				user.visible_message("<span class='warning'>[user] accidentally sets off [src], breaking their fingers.</span>", \
+				user.visible_message("<span class='warning'>[user] accidentally sets off [src], breaking [user.p_their()] fingers.</span>", \
 									 "<span class='warning'>You accidentally trigger [src]!</span>")
 				return
 		..()
@@ -114,7 +114,7 @@
 
 	on_found(mob/finder as mob)
 		if(armed)
-			finder.visible_message("<span class='warning'>[finder] accidentally sets off [src], breaking their fingers.</span>", \
+			finder.visible_message("<span class='warning'>[finder] accidentally sets off [src], breaking [finder.p_their()] fingers.</span>", \
 								   "<span class='warning'>You accidentally trigger [src]!</span>")
 			triggered(finder, finder.hand ? "l_hand" : "r_hand")
 			return 1	//end the search!

code/modules/clothing/clothing.dm

@@ -489,7 +489,7 @@ BLIND     // can't see anything
 									for(var/obj/item/I in O.contents) //Dump the pocket out onto the floor below the user.
 										user.unEquip(I,1)
 
-					user.visible_message("<span class='warning'>[user] bellows, [pick("shredding", "ripping open", "tearing off")] their jacket in a fit of rage!</span>","<span class='warning'>You accidentally [pick("shred", "rend", "tear apart")] \the [src] with your [pick("excessive", "extreme", "insane", "monstrous", "ridiculous", "unreal", "stupendous")] [pick("power", "strength")]!</span>")
+					user.visible_message("<span class='warning'>[user] bellows, [pick("shredding", "ripping open", "tearing off")] [user.p_their()] jacket in a fit of rage!</span>","<span class='warning'>You accidentally [pick("shred", "rend", "tear apart")] [src] with your [pick("excessive", "extreme", "insane", "monstrous", "ridiculous", "unreal", "stupendous")] [pick("power", "strength")]!</span>")
 					user.unEquip(src)
 					qdel(src) //Now that the pockets have been emptied, we can safely destroy the jacket.
 					user.say(pick(";RAAAAAAAARGH!", ";HNNNNNNNNNGGGGGGH!", ";GWAAAAAAAARRRHHH!", "NNNNNNNNGGGGGGGGHH!", ";AAAAAAARRRGH!"))

code/modules/clothing/head/misc.dm

@@ -222,7 +222,7 @@
 		return 1
 
 /obj/item/clothing/head/fedora/proc/tip_fedora(mob/user)
-	user.visible_message("[user] tips their fedora.", "You tip your fedora")
+	user.visible_message("[user] tips [user.p_their()] fedora.", "You tip your fedora")
 
 
 /obj/item/clothing/head/fez

code/modules/clothing/masks/miscellaneous.dm

@@ -22,8 +22,8 @@
 		return 0
 	else if(security_lock && locked)
 		if(do_unlock(user))
-			visible_message("<span class='danger'>[user] unlocks their [src.name].</span>", \
-								"<span class='userdanger'>[user] unlocks their [src.name].</span>")
+			visible_message("<span class='danger'>[user] unlocks [user.p_their()] [src.name].</span>", \
+								"<span class='userdanger'>[user] unlocks [user.p_their()] [src.name].</span>")
 	..()
 	return 1
 

code/modules/clothing/under/accessories/accessory.dm

@@ -250,7 +250,7 @@
 		to_chat(user, "Waving around a badge before swiping an ID would be pretty pointless.")
 		return
 	if(isliving(user))
-		user.visible_message("<span class='warning'>[user] displays their Nanotrasen Internal Security Legal Authorization Badge.\nIt reads: [stored_name], NT Security.</span>","<span class='warning'>You display your Nanotrasen Internal Security Legal Authorization Badge.\nIt reads: [stored_name], NT Security.</span>")
+		user.visible_message("<span class='warning'>[user] displays [user.p_their()] Nanotrasen Internal Security Legal Authorization Badge.\nIt reads: [stored_name], NT Security.</span>","<span class='warning'>You display your Nanotrasen Internal Security Legal Authorization Badge.\nIt reads: [stored_name], NT Security.</span>")
 
 /obj/item/clothing/accessory/holobadge/attackby(var/obj/item/O as obj, var/mob/user as mob, params)
 	if(istype(O, /obj/item/card/id) || istype(O, /obj/item/pda))
@@ -284,7 +284,7 @@
 
 /obj/item/clothing/accessory/holobadge/attack(mob/living/carbon/human/M, mob/living/user)
 	if(isliving(user))
-		user.visible_message("<span class='warning'>[user] invades [M]'s personal space, thrusting [src] into their face insistently.</span>","<span class='warning'>You invade [M]'s personal space, thrusting [src] into their face insistently. You are the law.</span>")
+		user.visible_message("<span class='warning'>[user] invades [M]'s personal space, thrusting [src] into [M.p_their()] face insistently.</span>","<span class='warning'>You invade [M]'s personal space, thrusting [src] into [M.p_their()] face insistently. You are the law.</span>")
 
 /obj/item/storage/box/holobadge
 	name = "holobadge box"

code/modules/flufftext/Dreaming.dm

@@ -43,7 +43,7 @@
 		nightmare()
 		if(ishuman(src))
 			if(prob(10))
-				emote("writhes in their sleep.")
+				emote("writhes in [p_their()] sleep.")
 				dir = pick(cardinal)
 
 /mob/living/carbon/proc/experience_dream(dream_image, isNightmare)

code/modules/food_and_drinks/drinks/drinks/cans.dm

@@ -40,7 +40,7 @@
 
 /obj/item/reagent_containers/food/drinks/cans/attackby(obj/item/I, mob/user, params)
 	if(istype(I, /obj/item/storage/bag/trash/cyborg))
-		user.visible_message("<span class='notice'>[user] crushes \the [src] in their trash compactor.</span>", "<span class='notice'>You crush \the [src] in your trash compactor.</span>")
+		user.visible_message("<span class='notice'>[user] crushes [src] in [user.p_their()] trash compactor.</span>", "<span class='notice'>You crush [src] in your trash compactor.</span>")
 		var/obj/can = crush(user)
 		can.attackby(I, user, params)
 		return 1

code/modules/food_and_drinks/drinks/drinks/shotglass.dm

@@ -90,7 +90,7 @@
 	if((CLUMSY in user.mutations) && prob(50))
 		clumsilyDrink(user)
 	else
-		user.visible_message("<span class = 'notice'>[user] places their hand over [src] to put it out!</span>", "<span class = 'notice'>You use your hand to extinguish [src]!</span>")
+		user.visible_message("<span class = 'notice'>[user] places [user.p_their()] hand over [src] to put it out!</span>", "<span class = 'notice'>You use your hand to extinguish [src]!</span>")
 		extinguish()
 
 /obj/item/reagent_containers/food/drinks/drinkingglass/shotglass/MouseDrop(mob/living/carbon/human/user)