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1.
Noun- Similar to fagnuts buttnutt ballgazer A term of endearment, emasculating a friend or aquaintance.
Me "Wassup cumberbuns??! Youre looking pretty gay today!" "Now go fuck yourself!"
by DIRTYROTTENSTEVE May 07, 2005
 
2.
When you're girl friend passes out before you bust a nut
so you flog the bishop till you skeet all over the bitches' ass.
The bitch was too damn drunk to fuck, so I gave her sleepin ass a cumberbun
by EZEthan September 11, 2006
 
3.
Verb

to cumberbun; cumberbunned, cumberbunning

1. The act of shoving a cucumber up someone's ass.
"I'm gonna take your grandma upstairs and cumberbun her."
by billebllunt September 25, 2014