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