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