a bacterial disease
skinny white boy who looks like he has down syndrome = firth
von sam excellent 4. Dezember 2003
The process of being penetrated in the booty hole while giving birth.
Christopher is a firth baby.
von CupDude 17. Februar 2009
A derivative of filth. Meaning lower than specks of dust on your shoes.
Man, that is pure firth!
von Crismon 16. Juni 2003