A homosexual, someone who humps ones rump.
I always knew he was a rump humper.
by yesh,, March 18, 2008
Get the rump humper mug.
Someone who humps someones ass.
Alex is an offical rumphumper, after she humped hevyns rump in the locker room.
by Alex January 20, 2003
Get the Rump Humper mug.