Green’s Dictionary of Slang

(US campus) to vomit.

1964		in Current Sl. (1967) I:4.
1975		G. Underwood ‘Razorback Sl.’ in AS L:1/2 55: Ralph ‘to vomit’.
1984		Totally True Diaries of an Eighties Roller Queen 1 Sept. 🌐 John got drunk off four beers and was ralphing his guts out.
1989		M. Belmonte Compter Science and Why (1993) 🌐 I was struck with [...] the plethora of words and phrases meaning ‘vomit’ and/or ‘to vomit’ [...] At most American colleges and universities, a weekend cannot pass without seeing multitudes [...] rauf.
1995		A. Heckerling Clueless [film script] Oh, actually, I was really bad today, I had two moccacinos, I feel like ralphing.
1997–2001		Online Sl. Dict. 🌐 bob v 1. to vomit. (‘I think I’m gonna bob!’).
2000		C. Cook Robbers (2001) 65: Flew from Baton Rouge to Shreveport one time, lost my lunch. Ralphed in a sack.
2022		Twitter 20Dec. 🌐 I’m going to carefully shuffle-jog to the post office & probably stand in an enormous queue to send Christmas cards to Australia, I hope without ralphing (I’m not ill, it’s an ongoing health thing.