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1.
1. A person who enjoys fumbling the buttocks of a member of the same or opposite sex.

2. A joke used to confuse friends.
"Dude you're such a bumfumbler."
"Not uh."
by t3hm4n March 28, 2006
 
2.
Noun. One who has or is fumbling the Bum
Alexander is a smeller bum fumbler
by Boobs17462 May 18, 2007