face gunt Share definition Flag Face gunt is when you have become so morbidly obese that your body has no other choice but to store fat in you face. In some extreme cases the forehead. Guy 1:- have you seen that girl over there she's so obese even her forehead is fat.Guy 2:- she's got face gunt. face gunt by T.M.I January 3, 2016 Get the face gunt mug.