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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When your getting chased in a horror game and the thing chasing you is right on your ass
by Deadheartstealer August 12, 2018
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The proper way to squat. Only girls and phaggots complain about this and if you think it kills your knees your just a pussy. Basically you go further pass parallel tell your ass is almost touching the ground ("grass"). This ensures you properly work all the muscles. And it looks way more bad ass. 225 ass to the grass or bust. Also known as ATG
Bob: *quarter squatting 225*

Frank: hey bob why don't you stop being a pussy and start squating ass to the grass *squats 315 ATG for ten reps*
by CTU_FieldAgent200 May 22, 2010
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Approximates to: You just fucked up big time, and now you're answering to me! Originated in the military.
Commanding Officer: You tried drifting a Humvee till it went Tango Uniform and then blamed it on your bunkmate?! Your ass is grass, boy, and I'm the mower!
by anonymous January 29, 2005
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