To pregame or drink before you begin your night out on the town. To consume alcoholic drinks at one's home, perhaps due to: a rough economy with hard times, being an underage child without a fake ID, or in most cases, insurance for good times.
Me: "We're going to a speed dating event tonight???"
John: "Yep at 10pm"
Me: "Wanna come over and fill up your tank at 8?! I'm gonna need it!"
by Stephanie Cooper February 11, 2009
Get a Fill Up Your Tank mug for your coworker Manley.
The art of having anal sex with a female, and while she isn’t looking you pee in her butthole to save you a trip to the bathroom.
Chad: Dude my girlfriend broke up with me because she was shitting piss for days after I gave her the good ol’ Gas tank fill-up
by Longballe_d October 09, 2018
Get a Gas tank fill-up mug for your friend Larisa.
To have ejaculated some premium oil inside a fine women
Oh boys, filled the tank tonight, but it so jokes because I don't know who she is.
by PetroCanada69 September 28, 2014
Get a Filled the tank mug for your bunkmate Riley.