A derivative of filth. Meaning lower than specks of dust on your shoes.
Man, that is pure firth!
od uživatele Crismon 16. červen 2003
The process of being penetrated in the booty hole while giving birth.
Christopher is a firth baby.
od uživatele CupDude 17. únor 2009
Puss-filled bubble, usually located around the anus.
"Yo, is that Firth in that Chevy?"
od uživatele Dr. Curtis 06. prosinec 2003