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To have (tris, gatorade, bitches, swag) for days. To have it "mad rain quick time in here for days".

To ruin your friend's advances on a female so bad, that he doesn't even want to be associated with you or the female ever again.
Guy: "hey ladies"
Shahiner: "we got tris for days"

bystanders: "that guy is shahin-ing"
by Scoootar September 26, 2010
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The act of witnessing dj Shahin live.
Yo man, I was Shahining all night long! Where's the afterparty?

Fuck, I was Shahining balls last night.... where's the afterparty?
by SamsonMTL August 25, 2013
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