diff --git a/code/datums/traits/neutral.dm b/code/datums/traits/neutral.dm
index 911929896b..f0a925b9d1 100644
--- a/code/datums/traits/neutral.dm
+++ b/code/datums/traits/neutral.dm
@@ -121,3 +121,12 @@
 	mob_trait = TRAIT_EXHIBITIONIST
 	gain_text = "<span class='notice'>You feel like exposing yourself to the world.</span>"
 	lose_text = "<span class='notice'>Indecent exposure doesn't sound as charming to you anymore.</span>"
+
+/datum/quirk/coldblooded
+	name = "Cold-blooded"
+	desc = "Your body doesn't create its own internal heat, requiring external heat regulation."
+	value = 0
+	medical_record_text = "Patient is ectothermic."
+	mob_trait = TRAIT_COLDBLOODED
+	gain_text = "<span class='notice'>You feel cold-blooded.</span>"
+	lose_text = "<span class='notice'>You feel more warm-blooded.</span>"