to hit hard and percise. Usualy producing a THWACK sound.
With a "THWACK" the bamboo rod hit table.
by Myoga1 February 24, 2004
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hero's move in smash that can insta kill anyone
Jack: i have reverse card try and beat me bob
Bob: (thinking emoji) Thwack
by b i g up December 06, 2019
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to be speed up as much as possible off of speed/meth
lets get all thwacked out, go to the titty bar and rub tuna on ourselfs then go home to our women...
by Dann¥ May 19, 2007
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To receive a hand job or blow job, and to not finish.
"Dude, she was thwacking me for an hour yesterday."
"How did you not finish bro?
by Dan GleeSack December 06, 2012
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to hit
Nikki thwacked her friend on the arm.
*thwacks you
by ^_^ September 28, 2003
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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!"
by Steven Spears April 14, 2005
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