thwack 

to hit hard and percise. Usualy producing a THWACK sound.

With a "THWACK" the bamboo rod hit table.

thwack by Myoga1 February 24, 2004

Thwack 

hero's move in smash that can insta kill anyone

Jack: i have reverse card try and beat me bob
Bob: (thinking emoji) Thwack

Thwack by b i g up December 6, 2019

Thwack 

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?

Thwack by Dan GleeSack December 8, 2012

thwack 

to hit

Nikki thwacked her friend on the arm.
*thwacks you

thwack by ^_^ September 28, 2003

thwack 

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!"

thwack by Steven Spears April 14, 2005

thwack 

The sound made by the scrotum striking the belly of a women whilst making love doggy-style

The thwack sound echoed through the room as I reached satiation.

thwack by Hayers111 February 26, 2007

thwack 

A firm thumb that a hard penis gives to a female (or male... depending on your taste), in any number of places.

Puedes THWACK tu SCHLONG en mi cara, por favor?
Translation: Can you THWACK your SCHLONG in my face, please?

thwack by Nicka-Licka-Dicka March 3, 2005