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!"
by antivenom510 September 20, 2009
Top Definition
An invention used to wash your filthy ass in.
Albert was so relieved to wash his fat stankin ass in the tub.
by Mr. Dwayne May 31, 2005
Refering to someone that is overwieght.
"Hey tubs, why don't you go on a diet?
by Dexter October 02, 2003
A person who is a bit more than chubby but not fat or rounded.
Person 1: Hey did you see that fat kid?
Person 2: He's not fat he's a tub.
Person 3: You are a tub.
by Thedragonquest9nerd April 24, 2011
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