An amalgamation of fingering and bums, fumming is the act of inserting one's finger into the anus for pleasure
Eg. D introduced M to the wonderful world of fumming last night and now she can't sit still

I couldn't concentrate in lectures thinking about that fumming I got last night in D's car
by Fish chow mein February 26, 2019
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When you fart and cum at the same time making the experience even nastier.
Bro! I totally Fummed her last night. She puked.
by ISUNick March 30, 2011
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The act of being fummy. To bludge. What one does at work after Friday's pub-lunch. Doing bugger all and dragging everyone else down with you.

Another, less common, form of fumming involves sitting next to a colleague while he is on the phone to a customer and scrawling all over his notepad whilst giggling. The notepad should end up containing a crude caricature of the colleague's sister with the words, "Please wear pants to my party" in a speech bubble. This slightly more obscure form of fumming can often be the most effective as both parties usually end up imploding in a fit of giggles.
The Letter M: "So, Soulless Ginge, what have you done today?"
Soulless Ginge: "Nothing mate. I've been fumming all day today."
The Letter M: "Okay. Let's sit around with Angry Italian and make knob jokes."
by The Letter M May 2, 2006
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A fum is a fat ugly midget, it’s someone who is annoying or being annoying and is commonly used as an insult
Hey stop being such a fum

“OMG isabella and taryn are such fums
‘Yeah I know right, they’re such fat ugly midgets’
by Trinitystant September 1, 2020
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Jerking your flaccid cock so quickly that you blow your load before you even get hard.
Guy 1- Dude I need to release some tension
Guy 2- But we need to be out the door in 2 minutes, we don’t have time?!
Guy 1- Hold my drink and watch this
(40 seconds later)
Guy 1- IM FUMMING!!!!
Guy 2- DUDE!!!!! 🤜 🤛
by Sheldonia March 17, 2021
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A fum is a musical instrument,consisting of a rubber band stretched across a cat's ass,and played with one's tongue.
"He couldn't win America's Got Talent,even if he played the fum while riding the unicycle nude!"
by evilstevil August 5, 2009
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Fucked Up Mess. comes from the saying that someone is a mess and a right state.
look at the state of him, what a fum. Also that website is a fum, where as www.rtcrew.co.uk is not
by Glyn September 7, 2004
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