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The The 11th finger that comes out of a girl's bum to enter a man's bum while they are having sex.
The sex was pretty bland until her bum finger crept out.
by Sebastian Ro-Fo December 07, 2013
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Sep 6 Word of the Day
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Damn that was a steezy ass kickflip son!
by niggaliciouszor April 29, 2007
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The finger that is frequently used to pleasure the anus.
Oh no, i've sprained my bumfinger

John's bum finger looks brown. He must hae been using it.
by olly April 13, 2004
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The expession used to describe one's fingers after one has satisfied their habit of picking their anal passage. The individual associated with this habit is Sir Steven of Stechford. Rumour has it, the bum fingers of the master of this art, can be caught by scent from over 200 miles away.
"Steve, get your bum fingers away from me."

"Steven, I can smell your bum fingers"

"Where is Steven?"
"Probably sitting at home with his fingers up his bum"
by Jonathon Locke August 14, 2008
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Scratching/stroking ones ass crack, then gently brushing finger/s under victims nose, so they catch a horrific scent...WARNING: It is possible to become obsessed with sniffing your own fingers
"Last night, outside reflex, Robbie bum fingered Vicki and she was shocked"
"Vicki scratched her ass, and sniffed her own fingers and couldn't stop....'what an odd, enchanting scent' she thought"
by haha47 January 29, 2009
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The Fingering of somebody's ass crack to maximize pleasure. Can results in nails being snapped off and internal bleeding. Bum Finger ussually takes place after a good bout of fart eating leap frog which creates of lots of sexual energy and vibes.
"Catch my fart in your mouth Amelie then jump over me and fart in mouth, it really makes me horny!"

"OK! But can we do Bum Finger afterwards because i've been priming my fingers all weak by sticking them in my own shit"
by CaptainMorgan'sMum September 06, 2011
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The reclassification of a human finger/owner of the finger following a skin graft taken from the buttocks of the individual in question. Usually but not exclusively as the result of an accident. To be uttered to the tune of "Goldfinger".
A: "Oh no, he cut off the tip of his finger, he might have to have a skin graft"

B: "Don't they usually take the skin from your arse?"

A: "what and have a bumfinger? ...

by Dr. Stofadopalous April 14, 2011
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