look up any word, like donkey punch:
 
1.
A contraction of: it was not
'Twasn't the night before christmas.
by The-Whale-Bullier April 17, 2011
 
2.
the area on a man between the nutsack and the asshole
if twasnt there - your insides would fall out
by Beaver660 August 05, 2006
 
3.
The Old English new age combination of the words: It, Was, and Not.
"What night did that burglar break into the house?"

"T'wasn't the night before Christmas."

"You're a douche."
by Benjiforce1 September 30, 2010
 
4.
Its an alternate form of saying the word "Taint."
She tickled the area near my undercarriage that twasnt my balls or ass.
by Steve December 13, 2003