to thwackit is to jackoff, spank the monkey, flonk the dolphin, rope the poney, wrestle with the snake, choke the chicken etc. etc.
by da cheese June 17, 2003

by Myoga1 February 24, 2004

by b i g up December 6, 2019

lets get all thwacked out, go to the titty bar and rub tuna on ourselfs then go home to our women...
by Dann¥ June 6, 2007

by Dan GleeSack December 8, 2012

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
