1) A vagina that has been pounded so much by erect penises that it has become a resting place for said penises.
2) A nickname for a woman who has a tattoo labeled "boner garage" and an arrow pointing to her vagina.
Man 1: How many guys has she fucked?
Man 2: At least one hundred Man 3: Man, hopefully her boner garage isn't still full.....I'm going for it
By Lexy
Boner Garage
A woman who loves/addicted to sex so much she refers to her vagina as a boner garage.
A "Boner Garage" is a place to park your lovely boner! Your significant other or that hoe Sheva that you met down the street could often serve as your "boner garage".