From Middle English bolken (“to vomit, overflow”), from Old English bealcan (“to belch, utter, bring up, sputter out, pour out, give forth, emit, come forth”), from Proto-Germanic *belkaną (“to belch”). Cognate with Dutch balken & bulken (“to bellow”), German bölken (“to roar”). See also belch.
- 1996, Irvine Welsh, Trainspotting 
- — God sake... god sake... Mr Houston repeated as Mrs Houston boaked and I made a pathetic effort to mop some of the mess back into the sheets.
- 1997, Alan Warner, Movern Callar 
- I was going to boak: I made the window and opened it but most of the sickness hit the window-sill in a heap.
- 1999, Ian Rankin, Black and Blue 
- He’d skipped breakfast—didn’t like the idea of boaking it back up on the flight.
- 1999, Kate Atkinson, Behind the Scenes at the Museum 
- I think it was at this moment that Patricia lurched from the table, informing everyone that she was going to be sick and indeed was as good as her word, throwing up before reaching the door (‘Heinrich, fetch a clout — the lassie’s boaked!’).
- For usage examples of this term, see the citations page.
- (Lallans and Ulster Scots) to vomit