Unplummet 

A sudden rise in the stock market.

After the market plummeted 900 points last Thursday it turned around and unplummeted 500 points in one minute.

Unplummet by Bare Sterns May 11, 2010

unplummer 

The unplummer is an age old classic; The act of sticking your penis into a womans asshole right as she is about to deficate, thus reversing the 'plummers' role of unclogging shit out of a pipe.

Friend 1:That bitch ate the whole goddamn box of Triscuits.?
Friend 2: Sure did...
Friend 1: Does she know that tonight is the night you were going to give her the 'unplummer'?
Friend 2: Suuuuure does...

unplummer by Bruce Springstein September 7, 2008

unplumber 

The unplumber is an age old classic; The act of sticking your penis into a womans asshole right as she is about to deficate, thus reversing the 'plumbers' role of unclogging shit out of a pipe.

Friend 1:That bitch ate the whole goddamn box of Triscuits.?
Friend 2: Sure did...
Friend 1: Does she know that tonight is the night you were going to give her the 'unplumber'?
Friend 2: Suuuuure does...

unplumber by Registered March 28, 2007