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
Get the mug
Get a T'wasn't mug for your Aunt Beatrix.
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
Get the mug
Get a Twasn't mug for your daughter Jovana.