Picklebread's definitions
Tucking your dick back between your legs so you have the appearance of a tail poking out. Commonly confused with "the goat". A goat is considered being only the testicles tucked.
Guy1: Dude that chick was so hot
Guy2: she was totally a guy. I could see his stu tail poking out behind him.
Guy2: she was totally a guy. I could see his stu tail poking out behind him.
by Picklebread June 10, 2015
Get the Stu tailmug.