This phrase can be used to put emphasis on how giddy a friend, colleague or a familiar is.

It is usually used when said people have a sense of achievement or acquired something cheaper.

It can also refer to masturbating your anus with one of your fingers because you're too ugly to get laid.
Man 1: " I got a 2 for 1 deal on these sandwiches!"

Man 2: *makes masturbation gesture* "Finger bum wank sandwich deal!!! You're really saving those pennies!"

Or

Man 1: "Hey I got her number!"

Man 2: "Finger bum wank! She's only the village bike Mr sloppy seconds!"
by FessSquad June 1, 2022
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The act of kissing ones partner standing face on and flanking a sneaky finger into the anus to cause surprise
Michael was under the impression dale just wanted a kiss. Little did he know Reza was setting him up, face on for a finger bum flank
by DoctorZig March 4, 2016
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Guy who tries to put his finger in your bum when your mum makes you have a bath with him as a young kid
Oi finger bum bill remember you tried to finger me when we were kids
by Finger bum bill October 24, 2022
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Putting your finger in your bum to aid wanking if you have taken a load of oats and it's taking a while!
I opted for a Finger Bum Wank last night
by J-Boner! August 13, 2008
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The act of fingering your asshole with your finger/fingers covered in soap, while masterbating.
“I was struggling to get myself off so I decided to have a soapy finger bum wank
by KD Jackel October 17, 2021
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a particularly sick individual who is not satisfide with the usual five finger shuffle, and feels it nessecary to penertrate his own rectum with 1,2 or even three fingers whilst beating one off, adding to his own miss guided feeling of sexual gratification.
i was going to have a wank but i thought fuck it why not have a finger bum wank (FBW) i deserve it!
by franklin B wankface May 21, 2006
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