Green’s Dictionary of Slang

boke v.

also boak, bowk
[boke n.2 ]

to vomit.

[UK]J. Ray Eng. Words Not Generally Used 6: To Boke, to Nauseate, to be ready to vomit.
[UK]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!
Urban Dict. 🌐 cod trench The furry cup. I about boked when I got down to her cod trench, fucking minging man!
[UK]Roger’s Profanisaurus in Viz 87 Dec. n.p.: bowk v. To barf, vomit; boy up; create a pavement pizza (qv).
[UK]N. Griffiths Grits 252: Carn drink wahm fuckin gin, makes me fuckin boak.
[UK]N. Griffiths Stump 171: Boakin up yellow bile in the bowl at the side of the bed.
[Scot](con. 1980s) I. Welsh Skagboys 202: Suddenly she snaps forward n starts boakin up intae the bath.
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.