Green’s Dictionary of Slang

(US) crazy, eccentric, also adv.

1973		H. Fox Living underground 360: When I see the mad uterus staring me in the eyes, I go bugsh.
1978		S. King Stand 175: Lloyd Henreid thought that [...] he would go utterly and completely bugshit.
1986		S. King It (1987) 140: Those big boys, they drive me bugshit.
1996		J.D. Williams ‘Bug City’ Noir Mechanics 3 🌐 His wife was staring at me. I told him he was going bugshit. He cried and admitted this was so.
2002		I Box Publishing 🌐 Story creation is about the only thing I seem to be able to do for any length of time without going bugshit.
2012		J. Sorenson Caught in the Act 99: You’ve always been bugshit over that girl.
2017		T. Pluck Bad Boy Boogie [ebook] [H]e punched the bricks to feel anything other than bugshit crazy.