Said to hitchhikers: literally meaning pay for gasoline or give a sexual favour.
Baby, gas or ass. Pick one, or get out.
by BAcINBLACK February 7, 2019
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Motorcycle riders know that if you go too slow in a tight turn you will fall off your bike.
If you even think about a U Turn in this parking lot it is going to be gas or ass.
by Bobcat Tommy April 11, 2012
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Gas Ass is a terrible condition in which a person is constantly letting out extremely stinky farts. Another name for this is "Chronic Flatulence" but "Gas Ass" is easier to remember and it's more modern. After a period of time of having Gas Ass, the butt will smell like stinky poop for the next 24 hours. Gas Ass is so bad that the farts stink up the entire room and it smells so bad that everyone else in the room has to leave while moaning, coughing, wheezing, etc. and putting their noses in their shirts and their eyes close. Usually they will be cursing, screaming, etc. When one has Gas Ass, you can literally see a cloud of brown hover around their butt. Gas Ass is a condition that no one should have and should be treated as soon as it's discovered.
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Situation 1:

Calvin was sitting in class one day when he started to absolutely rip ass and loud and horrible-smelling as humanly possible.

Michael: Dude, Calvin has the worst case of Gas Ass ever!
Dude: I know!

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Situation 2:

Calvin has Gas Ass later that night and is absolutely ripping ass at the dinner table.

The Dad: Calvin, that smells f*cking terrible, what is your sh*t?

Sister: OHMYGODITSMELLSSOBAD!!!!!!!!!!!

The mom then passes out while the sister and the dad evacuate the room while Calvin has a big smile on his face.
by TheGasAssMaster November 28, 2012
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The act of inserting a gas pump into your anal cavity and proceeding to pump gas.
I wouldn't pledge Chad's frat, I heard he likes getting gas ass
by Graet August 4, 2018
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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.
by punkbass_20x6 January 15, 2006
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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 October 23, 2007
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the Holy Trinity of what a rogue vagabond biker needs on his eternal nomadic travels.
1. Robbie filled his motorcycle tank with gas today, he bought some doobies so he can chill out tonight and Shelley (who he met at a roadside tavern-casino on Highway 93) - well, she's his ... you know...
Gas, grass and ass.

2. On the school playground Mark had on a faded denim jacket that showed a biker with a nude chick smoking weed on a Harley hog together. The caption said "All I need is gas, grass and ass".
by I Saw U2 Live Twice March 26, 2010
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