Definitions by antivenom510

T.U.B.

Thumb up the butt. When having sex doggie style the man inserts his thumb while the other 4 fingers are up ward on her butt facing the swell of her back

"Dude i T.U.B.ed that girl last night. She was totally into it!"

T.U.B. by antivenom510 September 20, 2009