Refactored gibbing and slipping for carbon mobs, entirely removed mutantrace var. This commit is only partial, following commits are contiguous to it (lol this is atomic right)

code/modules/reagents/Chemistry-Reagents.dm

@@ -332,10 +332,9 @@ datum
 				if(!M) M = holder.my_atom
 				if(ishuman(M))
 					var/mob/living/carbon/human/human = M
-					if(human.dna.mutantrace == null)
-						M << "\red Your flesh rapidly mutates!"
-						human.dna.mutantrace = "slime"
-						human.update_mutantrace()
+					if(human.species.name != "Slime")
+						M << "<span class='danger'>Your flesh rapidly mutates!</span>"
+						human.set_species("Slime")
 				..()
 				return
 

code/modules/reagents/reagent_containers/food/snacks/grown.dm

@@ -428,16 +428,9 @@
 	return
 
 /obj/item/weapon/reagent_containers/food/snacks/grown/bluetomato/Crossed(AM as mob|obj)
-	if (istype(AM, /mob/living/carbon))
-		var/mob/M =	AM
-		if (istype(M, /mob/living/carbon/human) && (isobj(M:shoes) && M:shoes.flags&NOSLIP) || M.buckled)
-			return
-
-		M.stop_pulling()
-		M << "\blue You slipped on the [name]!"
-		playsound(src.loc, 'sound/misc/slip.ogg', 50, 1, -3)
-		M.Stun(8)
-		M.Weaken(5)
+	if (istype(AM, /mob/living))
+		var/mob/living/M = AM
+		M.slip("the [src]!")
 
 /obj/item/weapon/reagent_containers/food/snacks/grown/wheat
 	name = "wheat"

code/modules/reagents/reagent_containers/food/snacks/meat.dm

@@ -23,12 +23,10 @@
 	name = "synthetic meat"
 	desc = "A synthetic slab of flesh."
 
+// Seperate definitions because some food likes to know if it's human.
+// TODO: rewrite kitchen code to check a var on the meat item so we can remove
+// all these sybtypes.
 /obj/item/weapon/reagent_containers/food/snacks/meat/human
-	name = "-meat"
-	var/subjectname = ""
-	var/subjectjob = null
-
-
 /obj/item/weapon/reagent_containers/food/snacks/meat/monkey
 	//same as plain meat