The act of giving/trying to give a man a blow job while being extremely fuckin shit faced. So shit faced that you cannot even say it as blow job or even a bj. Which results as calling it a 'blow jay'.
'I am going to give you the best blow jay EVER!...With my mouth!'--Superbad
The Canadian way of saying blow job
Kevin: I will never get a blow jay. NSH: A WHAT??!??!?! Kevin: I meant blow job?? NSH: sure you did, you just don't know what a blow job is!! HEHEHHE