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"
Girl""Hiiiii"
Shahiner: "we got tris for days"

bystanders: "that guy is shahin-ing"
by Scoootar September 27, 2010
Get the Shahin-ing mug.