look up any word, like ethered:
 
1.
1. To fuck something up beyond recognition.
2. Backwoods retard
1. Goddamnit! That stupid asshole mounced my whole day!
2. Don't be such a mounce, dude.
by Clit Eatswood December 31, 2005
 
2.
A combination of the words "Mount" and "Pounce" typically referring to a sexual activity.
I mounced Tesla last night.
by Gillag April 20, 2008
 
3.
1. v.t.: literally, mouse sex
At first Charlotte thought the field mice were wrestling; on examining the little darlings more closely she found to her dismay that they had begun to mounce.
by H. Babbit March 11, 2011