Scottish slang meaning vomit or feelings of excessive nausea.
"Gonnee put that tit away. Yer givin' me the boak" - Burney Nesbitt.
by World of Weird July 10, 2003
1 more definition
Slang for a very large quantity of marijuana; enough to substantially alter one's behavior. Different for each person.
"Oh man, I smoaked a boak last night and ate an entire pizza!"
by analect July 16, 2007