Shiznix means "the new in thing" "a popular item or action" It can also mean something someone has or does that is fashionable or "cool" and others want to have it or be like that person in the sense that they want to have the shiznix
"Dude your belt is sweet!" "Yeah man, its the shiznix" "how about that party last night" "yeah it was THE shiznix by far!"
by Em February 10, 2005
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