The act of yanking someones top down to reveal their
bra. To welly someone takes
alot of
stealth and the victim must be taken by surprise for it to be counted as wellying.
Guy 1: Wtf just happened??
Guy 2: I
think that girl just
got wellied by her friends!
or
Guy 1: Where were you most the
night??
Guy 2: I was following this girl round wellying her... she had the biggest tits ever!