Ass Clown - A definition

1. Ass clown

ass clown (ás kloun) n.: one, who, through the fault of his parents conception, is a skid mark in society's collective underwear.

2. ass clown

One whose stupidity and/or ineptitude exceeds the descriptive potential of both the terms ass and clown in isolation, and in so doing demands to be referred to as the conjugate of the two.

This was taken from the Urban Dictionary: http://www.urbandictionary.com/define.php?term=ass+clown. This the coolest dictionary.