From the Yiddish meaning someone's buttocks.
Get your tookis over here!
by Cookie G. August 27, 2006
the hind quarters of a human: ass, butt, rear end...
That homework was a pain in the tookis!
by Sobo March 22, 2003
A chick who's stomach sticks out farther than her tits.
The boys jeered "tooki!'" to the rather large woman who crossed the road.
by Sheldar June 04, 2003