Green’s Dictionary of Slang

to vomit.

1674		J. Ray Eng. Words Not Generally Used 6: To Boke, to Nauseate, to be ready to vomit.
1932		M. Marshall Travels of Tramp-Royal 46: The lum reek, the pavement glaur, forbye yon smell that comes out of the stanks in the syver – man-a-man, he bokes at it all!
1993–2003		Urban Dict. 🌐 cod trench The furry cup. I about boked when I got down to her cod trench, fucking minging man!
1997		Roger’s Profanisaurus in Viz 87 Dec. n.p.: bowk v. To barf, vomit; boy up; create a pavement pizza (qv).
2000		N. Griffiths Grits 252: Carn drink wahm fuckin gin, makes me fuckin boak.
2003		N. Griffiths Stump 171: Boakin up yellow bile in the bowl at the side of the bed.
2012		(con. 1980s) I. Welsh Skagboys 202: Suddenly she snaps forward n starts boakin up intae the bath.
2019		A. Parks February’s Son 181: ‘Blood splattering everywhere? You’d be boaking your load and fainting’.
2021		L. Inglis Twitter 21 Aug. 🌐 I don't don't find ‘staged’ comedy funny, at all, which is why Friends and whatever, makes me boak.