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1.
A play on the word shiznit. Used in the clut cartoon Aqua Teen Hunger Force. See also: shiznit, ATHF
Now that I have seen that on TV, that is the shiznight" or "Aqua Teen Hunger Force is tha shiznight"
by Nick October 08, 2004
 
2.
used in aquateen hunger force.It shows that something is important and useful. often used when some one is happy!
nick is the shiznight for watching ATHF. fo real
by billy January 25, 2005