What some people consider the rules of hitchhiking, where the hitchhiker, upon pickup or throughout the trip, must either provide: 1)Gas for the car, 2)Some type of sexual satisfaction, or 3)Some type of drug, usually marijuana.
Hitchhiker: Yo dude, can i get a ride? 
Dude: Gas, ass, or grass.
Hitchhiker: *pulls out baggie* Grass.
Dude: Gas, ass, or grass.
Hitchhiker: *pulls out baggie* Grass.
by punkbass_20x6 January 15, 2006
 Get the gas, ass, or grassmug.
Get the gas, ass, or grassmug. by rebel27 December 18, 2008
 Get the Your ass is grassmug.
Get the Your ass is grassmug. by Light Joker July 6, 2004
 Get the someone's ass is grassmug.
Get the someone's ass is grassmug. When someone asks you to drive them somewhere, they can pay with gas, ass, or grass.  Gas(money for gas), ass(a sexual favor), grass(marjuana).
Ling Ling: "I just drove you all the way to Africa.  You know the rules... gas, grass, or ass."(gas, ass, or grass)
by mikec00l January 5, 2009
 Get the gas, ass, or grassmug.
Get the gas, ass, or grassmug. A way of saying thank you when you forget how to spell Gracias because your a big disgrace to your Hispanic parents
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by Maika the burrito  June 21, 2017
 Get the grass assmug.
Get the grass assmug. you're gonna get pounded
by Ilovebambam October 5, 2020
 Get the your ass is grassmug.
Get the your ass is grassmug. by Ilovebambam October 5, 2020
 Get the Your ass is grassmug.
Get the Your ass is grassmug.