Top definition
A person who provides oral sex to a younger girl, particularly below 13 years old. Derived from 'rug muncher' but becomes floorboard due to the girl having no puibs.
jack in 4th year is going out with jill in 1st year, jack is a floorboard muncher.
by D-mass November 29, 2009
Get the mug
Get a Floorboard muncher mug for your father Trump.