You have just had an argument, or told a lie, and its very close to coming back to haunt you. This is the moment when you want to reply, but realise its too late.
This phrase can often follow:
*A stammering of non-linked words
*An "Oh no I mean"
*A deep breath *It can also be said as the person is allready leaving/gone.
(four girls in a bikini with big tits walks into Rob's house and he is pure and loves god)
Rob: oh shit OH GOD FUCK NO WAIT FUCK GOD NO AHH HELP IM GONNA GET FUCKING RAPED HELP FUCK NO PLEASE HELP NO, NO, NOOO- (Rob breaks out of his bedroom's window and escapes the hoeslut thot girls)