Bruk as in "jam terms" :
Guy 1: yo i bruk dat girl last night at that jam
Guy 2: say word, was she good?
Guy 1: Yea she was iight, but i gave her bare backaz
'Bruk!' is an expression that can be shouted out when another person has failed at an attempt in doing something, been told off, or generally has made an ass of themself.
Heet: 'Sorry, I don't date smacktards'.
Casual Observer: 'Bruk'!