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The act of sticking a joint of weed in someones ass on April 20th, and smoking it.
John: Hey, Seth, bend over please.

Seth: Why the hell do you want me to bend over?

John: Calm down man, I'm just gonna smoke a Four Twenty Butt Blunt out from your ass.

Seth: Oh. Ok.

-Mike Zeeeeeeeeeeeeeeeeeeeeeee
by o DubBZzy April 20, 2010