A derivative of filth. Meaning lower than specks of dust on your shoes.
Man, that is pure firth!
מאת Crismon 16 ביוני, 2003
The process of being penetrated in the booty hole while giving birth.
Christopher is a firth baby.
מאת CupDude 17 בפברואר, 2009
Puss-filled bubble, usually located around the anus.
"Yo, is that Firth in that Chevy?"
מאת Dr. Curtis 6 בדצמבר, 2003