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2.
When someone does something absolutely batshit insane, it is said that they are smoking supercrack.

Supercrack is just what it sounds like: crack, but super powered.
Joey: Wesley tried to score with that chick? What is he smoking?
Matt: Probably supercrack.
Joey: What's supercrack?
Matt: (punches Joey in the face)
by neo! August 03, 2009
 
1.
Super crack is what you get when you combined cocaine, of course backing soda, and the thing that makes super crack so super is pure sugar coded with pounds and pounds of sugar from Africa.
Hay Bill do you want some crack?

Crack? I will take some super crack instead.
by futuramaking May 14, 2008
 
3.
When someone does something or something is done that is just so crazy they have to be on some crack and then some more crack.
you: HOLY SHIT! THAT GUT BIT OFF HIS OWN TOE!!!!

guy next to you: THAT GUY IS ON SUPER-CRACK!!
by Vlad von Veggieberger November 27, 2009