When,
usually at the bar or a party, a guy (your buddy, unless your a total dick) goes for a broad, but you call out
something that won't give him a chance. It's usually about an STD or him having a wife.
The
opposite of being a wingman
"The Gil sewered seabass so bad at the bar last night!"
"I
just fuckin', sewered
the bastard when he went to pork my broad."
(At the bar) "
Hey BUDDY? Have ya told her about your HIV?"