If you're 'off boobs' then you've drunk to the stage where you lose the plot and do things that would seem outrageous and unacceptable where you sober.
Policemen: Excuse me, why did you just brick that granny's window?
NK: Cos off boobs init
Policemen: Well I'm going to have to take you into custody
NK: Fuck that you daft cunt, I'm bailing..
*NK then runs int toot wall*