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1.
A combination of the words "bunch" and " of". Can mean a large number of something. Used to portray accents or phonetics.
What a buncha losers
by TetraEleven August 01, 2011
 
2.
Can be used to replace the words: Totally; completely; bloody; etc. Can be used to replace the word "Hella".
Yo homes, that that movie bunch'a rocked!!

Nice block! That save was bunch'a crucial!
by Ben Goldsmith August 02, 2005
 
3.
Buncha is taking bunch and a and putting them together
This is a buncha crap

Your all a buncha crack pots
by Clayton November 28, 2004