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 20, 2007
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thwacked is the condition your mind is left in after habitual drug use even after sobering up. a thwacked individual will behave differently than they would have if they had never consumed drugs, the most common being drug seeking behavior AKA fiending but also lack of common sense, decreased intuition, degraded performance, etc. opioid use disorder is a an example of a thwacked condition but ALL drugs (from weed to wellbutrin) have the potential to thwack you one way or another if you fail to moderate usage. the only treatment is time but in some cases prolonged drug use may leave you with permanent brain damage and you will be forever thwacked.
i was so thwacked i bought $5000 worth of oxycodone but then had a moment of clarity after i got fired... wanna buy my pills?
by steg0saur January 20, 2020
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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 7, 2019
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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 7, 2012
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to hit
Nikki thwacked her friend on the arm.
*thwacks you
by ^_^ September 29, 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 15, 2005
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