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1.
A person who has no more patience for you
"Man bun you."
by Tishia December 09, 2002
 
2.
The expression of saying 'allow you'....When you can't be bothered with someone....It can also be used as a reply to an insult
1)'Your a waste'
'Bun you!'

2) 'Hey girl can I have your number?'
'Bun you!'
by smns February 06, 2009
 
3.
Another way of saying Fuck You
alright, well BUN YOU for taking my girlfriend
by nagaho! January 18, 2011