Engaging in sexual intercoarse with a woman, presumably your wife or girlfriend, shortly after having sex with another woman. You basically are fucking her while your dick is still wet (metaphorically) from the previous encounter.
John had sex with his mistress and when he got home he wet fucked his wife.
by The Orginal Big Daddy G April 09, 2009
When you fuck a girl and halfway through you piss in her pussy.
I wet fucked my girl and she got so mad that she tied me to the bed and bit my balls so hard that I can't cum any more.
by Stinger June 20, 2004