Green’s Dictionary of Slang

barf v.

also barf one’s ring
[echoic/ring n. (1b), despite anatomical impossibility]

1. (mainly US campus) to vomit.

implied at barfer
[US] in E. Cray Erotic Muse (1992) 255: He farted in the coffee and he barfed in the tea.
[US](con. 1958) R. Farina Been Down So Long (1972) 17: Got her drunk on grasshoppers and she barfed all over the back seat.
[UK]P. Theroux Picture Palace 11: No one wanted me to go: afraid I’ll croak, barf on my shoes, faint on the plane.
[US]‘Joe Bob Briggs’ Joe Bob Goes to the Drive-In 77: May Ellen got completely hysterical and barfed all over Rhett Beavers’s yellow blazer.
[US]S. Morgan Homeboy 138: The Kulture King barfed beer froth across the stage apron.
[Ire]P. Howard The Joy (2015) [ebook] I barfed again, but I still loved. Soon I was shooting up any time I had the money for a ten-pound bag.
[UK]Guardian Weekend 12 June 53: She threw up on the bed (‘barfed’ is the word she used, being American).
[Ire]P. Howard Miseducation of Ross O’Carroll-Kelly (2004) 79: There’s vom all over [my clothes]. I must have been barfing my ring.
[US]C. Hiaasen Skinny Dip 203: If you barf in this canoe, you’re swimming home.
[US](con. 1962) J. Ellroy Enchanters 49: [P]op pills/booze/barf/pass out.

2. (US campus) as barf on, in fig. use, to treat unfairly.

[US]Baker et al. CUSS 77: Barfed on Treated unfairly on an exam.

In derivatives

barfer (n.)

(US) a disgusting, worthless person.

C. Rice Home Sweet Homicide 29: She slapped him. He squealed, ‘You barfer!’ and lunged.

In phrases

barf someone out (v.)

(US) to disgust, to revolt; usu. as excl. barf me out! an excl. of complete disgust; thus barfed out, disgusted.

[US]Frank Zappa ‘Valley Girl’ 🎵 It’s like totally disgusting / I’m like so sure / It’s like BARF ME OUT . . . / Gag me with a spoon!
[US]Eble Campus Sl. Mar. 1: barf me out – an expression of disgust.
[US]H. Rawson Dict. of Invective (1991) 36: An expression of strong disgust, as in ‘I’m totally barfed out!’ (San Fernando Valley Girl Talk, ca. 1983).
(con. 1980s) i80s.com 🌐 barf me out You might of heard this come from a Valley Girl after you’ve said something offensive to her. Also used to describe something you do not particularly like.
‘Valley Girls’ on Paranoiafanzine 🌐 Eeew! Grody to the max! I mean, I cannot believe you even chose this mega-dick. You must be a complete jel or something. I mean, barf me out, gag me with spoon! Gross!