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4.
The intense banging of two peoples palms that is an alternative to sexual intercourse.
Dave: Hey tom, smell my palm.

Tom: (sniffs) dude that smells! you fub that girl at the coffee shop?

Dave: Oh fub yeah. I fubbed her so hard she got carpal tunnel syndrome!

Tom: Fubbin' awesome dude!

(Both high five, but secretly are actually fubbing eachother.)
by Robbles the wise one June 14, 2011
 
1.
The act of sticking a finger up someone's bum during sex, either with their express request, reluctant permission, or (more amusingly) completely out of the blue.

Applies to both gay and straight.

Consider it a sort of polite alternative, or a beginner's version if you would, of fisting.

It comes from the acronym FUB - Finger Up Bum.
Derivatives like 'to fub', 'fubbed', 'well I'll be fubbed', 'fubstep' and so on are known to exist and are applicable according to context.
"I was having sex with this 8/10 girl yesterday and out of the blue, she starts fubbing me. No warning whatsoever! At first I didn't know what to do, but she was pretty fit so I just rode it out... Fubbed and proud!"
by Gibralteaser November 04, 2012
 
2.
the act of two men rubbing their beards together as a sign of greeting, friendship or affection. A contraction of "face rubbing".
Two mates fubbed as they met, by rubbing their beards against each other.

"Wow, did you just see those two gingers fubbing, that was awesome !!"
"Now I want to be fubbed"
by shadowbear September 03, 2014
 
3.
lesbian act of love, 'fanny rubbing'
Those two are busy upstairs fubbing
by foxylady_3 June 03, 2010
 
5.
The intense banging of two peoples palms that is an alternative to sexual intercourse.
Dave: Hey tom, smell my palm.
Tom: (sniffs) dude that smells! you fub that girl at the coffee shop?
Dave: Oh fub yeah. I fubbed her so hard she got carpal tunnel syndrome!
Tom: Fubbin' awesome dude!
(Both high five, but secretly are actually fubbing eachother.)
by Robbles the wise one June 02, 2011