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1.
The term Bunna is reserved for the the most self-centred, Often retarded people. General characteristic often inclued attention seeking, self pity and general cockness. Use when there is no other word to describe the target and scream out whilst saying it for greater effect.
ARGH! You god damn bunna!
by Salty the Slug May 15, 2004
 
2.
the most awesome person in the world.
you're so great, you're almost like bunna
by ETA April 19, 2005