Refering to an after affect of a substance, usually a drugs or alchol, that leave you in an altered, but sublime, state.
Girl 1: Girl last night, I has some green and was on my ass, I was so fucked up. That shit was some fire. I'm tryna get some yeah again, tonight.
by PG Dee (yeah that's it) November 30, 2005
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being super drunk/fucked up from weed/alc etc, but at a relaxed state
“I was on my ass after 2 bong hits and an edible
by aidenthetank December 9, 2020
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being super fucked up from a drug of some sort, but being at a relaxed state
“i was on my ass when i took 2 bong hits and an edible
by aidenthetank December 9, 2020
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When someone says something and you think it’s a lie. / You don’t believe in what they’re saying
Person 1: Me and name are in a relationship

Person 2: Relationship my ass
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Product of an owl and a bungee cord. (See Kung Pow for reference)
What do you get when you cross an owl with a bungee cord... MY ASS!
by Anonymous June 25, 2003
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A statement of defiance or a derogatory term expressing surprise, disappointment or irritation. Usually used when someone tells you something that you just honestly can't or won't enjoy.
“The fact you have to face is that you inadvertently killed two psyker brothers with your presence. This is why we decided that the Culexus Temple would be the best place for you,” He (Briar) explained.

“Culexus my ass,” Marcella rolled her eyes, “I’d rather be back home on Epsilon Regalis, or serving in Escholan’s retinue.”
by LyassacheckList August 12, 2016
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