- jack-shit
-
1. n. a stupid and worthless person. (Usually refers to a male. Usually objectionable.)□ Don’t be such a stupid jack-shit!□ What a jack-shit! Not a brain in his head!2. n. anything; anything at all. (Always in a negative expression.)□ This whole thing isn’t worth jack-shit!□ I wouldn’t give you jack-shit for that!
Dictionary of American slang and colloquial expressions. 2015.