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1.
A term used to tell someone to chill, go commit suicide, Smoke something, or take an ice shower.

Commonly said to a friend as in a joke-as in one person says No u, directly after someone says it.
Guy: ugh I fucking hate my life!
Guy#2: Just..Go Ice Yourself.

Guy:Fuck I'm so fucking pissed, fuck you, fuck the world!
Guy#2: Go Ice Yourself man, the tent you're starting to pitch is fucking nasty.

Guy:Go Ice Yourself.
Guy#2:No u.
Guy:No U
Guy#2:NO U Fucking bitch, I'll ice ur mom too!
by IKilledTheParty February 21, 2010