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1.
Buz
Said after when something crazy/unusual/weird happens, or is said. Usually pronounced "Buz". Kind of like What the Fuck, Holy shit and Huh? Rolled into one.
Dude 1: My girlfriend choked on my condom when it came off in her mouth. Dude 2: Buz!!!
by agnawt June 17, 2009
 
2.
buz
A very best friend. Short for "bosom buddies".
You can only have one.
Me: Hi Buz!
Nate: Hey Buz!
by Do.Work.Son. February 03, 2011