When you fill up your car with gas specifically to take a long drive to hook up with someone. To buy gas for a booty call.
She spent $32 to fill up her car so she can have a full booty tank so she could drive from Ft. Worth to Austin to hook up with him for a booty call.
by Teasie May 02, 2013
An attractive, voluptuous woman with a slim waist and well-rounded backside.
Damn, look at dat ass! She's a Booty Tank!
by Sparklelicious January 06, 2015