A derivative of filth. Meaning lower than specks of dust on your shoes.
Man, that is pure firth!
作者 Crismon 2003年6月16日
Top Definition
The process of being penetrated in the booty hole while giving birth.
Christopher is a firth baby.
作者 CupDude 2009年2月17日
Puss-filled bubble, usually located around the anus.
"Yo, is that Firth in that Chevy?"
作者 Dr. Curtis 2003年12月06日
a bacterial disease
skinny white boy who looks like he has down syndrome = firth
作者 sam excellent 2003年12月04日



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