Top definition
A monster that sits invisible in the dark. They can sometimes be identified by bodiless red eyes. What will always mark one is the sound of "fap fap fap fap ...".
Popular places for fap ghouls include the top corners of movie theaters, under basement steps, your closet, and school bleachers during cheer leading practice.

Janet knew there was a fap ghoul behind the vent in the girl's change room, but no one believed her.
by Sintrea March 22, 2010
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