The guy that cleans up ejaculated semen from the floor in a strip club or similar establishment.
After Krazy Kate pole danced naked, the jismopper had to clean up the semen from the floor.
by Silent Bob March 11, 2003
The guy that mops up the nudie booth after a guy shoots a load.
If I don't go to college I might end up as a jismopper
by Your Mom's Box October 09, 2003