What is Ass Gas Or Grass?
The most acceptable forms of payment for the favor of being given a ride to any destination. Roughly translates to: money, weed, or sex (oral sex is also acceptable). Gifts should be given promptly and without hesitation.
Brian: Well, here we are.
Girl: Aw, well thanks for the ride Brian-
*she begins to exit the car*
Brian: Hey- hey, hey! Not so fast, its ass gas or grass in this car, bitch. And it seems I've got a full tank and plenty of the fine erb, so uhhh... *nods head, indicating genitals*