When having sex doggy style, when the guy is about to ejaculate, he pulls out and then proceeds to spit on the girls back so that she turns around, and blows it right in her eye.
by Steven Spears January 16, 2007
Get the houdini mug.To firmly slap ones penis across another persons face i.e. to be either very manly or very homosexual.
"Dude! That little limp wristed faggot just thwacked me!"
One jock buddy says to another...
"WHOA! Billy's asleep, someone thwack him!"
One jock buddy says to another...
"WHOA! Billy's asleep, someone thwack him!"
by Steven Spears April 14, 2005
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