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Someone who will say one thing that sounds good, but when it comes to actually doing it, does the opposite.
Comes from Nick "Dick" Clegg's campaign in which he said how he will help Britain if he becomes PM ands when he did he backstabbed everyone who voted for him(namely in raising university fees).
Guy 1: i promise to keep university fees down.
Guy 2: got my vote and your in power. nice to keep fees at £3000
Guy 1: thanks, although i've just put fees up to £9000
Guy 2: You're such a clegger
Clegger by MiiDNiiT3 April 28, 2011
Related Words

cloggernaut 

What you call yourself after clogging many a toilet with your poops during your travels. A pun on the Juggernaut from the comic books.
Yup, I've clogged many a hotel toilet while traveling, more than I can count. I am the Cloggernaut! Clogger of toilets!!
cloggernaut by LonePooper January 25, 2018

Clegged Up 

A gamer term for "fucked up", especially referring to odd or strange accidents that are seemingly impossible to achieve within the normal laws of physics. Named after PlanetSide 2 developer Adam Clegg, who is notorious for his ability to push further the frontier of physics simulation and game engines.
Player 1: "That drop ship looks like an ostrich with its head in the sand."
Player 2: "Yeah, Adam Clegged up again."
Clegged Up by Ailos October 21, 2012

Kentucky Clogger 

Clogging a public toilet with a entire roll, two if available, of toilet paper. Then dropping the most massive, heinous shit one can muster up into the clogged bowl. This is followed by the most important feature of the Kentucky Clogger. With an empty toilet paper roll or one’s finger, depending upon preference, scoop up a little dollop of shit and write “Mitch was Here!” on the toilet seat.
I stopped at the truck stop to snap a douche and medicate my trucker’s knuckles and every stall had a Kentucky clogger.

I was surprised when I visited the rest room at the capital on the side of the House. I found a Kentucky clogger. I’m didn’t think Mitch left the senate to go over to the house.
Kentucky Clogger by Dick Onchin September 18, 2020

keith cheggers 

Keith Cheggers is a cockney slang phrase used to describe someone who is pregnant
"Oh my god..im keith cheggers my mums gona kill me!"
keith cheggers by Sexy_Mofo August 9, 2006

base clogger

When a person who has no real chance to score with someone prevents others from getting an opportunity.
That dumbass Jeff is a real base clogger; he needs to just get out of the way!
base clogger by Dick Shannery April 13, 2019
More from Urban Dictionary
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026

Pee Calculus

When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Pee Calculus by anorlondo October 1, 2026
Word of the Day on October 2, 2026
Literally "dirty" pronounced with a West Indian accent. Can also have a positive connotation, for example Sean Paul's album title "Dutty Rock".
"The girl is pretty but she corrupt and dutty!"

or, in a positive usage:

"Booya! That freestyle was dutty!"
Dutty by J Hall April 3, 2003
Word of the Day on October 1, 2026
korean word for madam, older woman
Ajumma wait a moment
Ajumma by aintnotinbutnice July 5, 2009
Word of the Day on September 30, 2026

Slop Grenade

When someone uses AI to generate a large document, slide deck, or piece of code/software and tosses it over the fence for you to deal with.
Chad: Hey Brent I sent you the new backend API change to review, it’s only 100 files changed.

Brent: he just tossed me a slop grenade
Slop Grenade by Joe Squid September 28, 2026
Word of the Day on September 29, 2026
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