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Pronounced with excessive exaggeration of the second "a", as in example 1. Shaddap is used to tell somebody to shut up without sounding overly serious. It can also be used pre-emptively, as in example 2. The crowning usage of shaddap however is as an unexpected end to a phrase, particularly when used to imply that somebody had said something extremely stupid.
1. "Shaddaaaaaaaaaaaap."

2. "I know what you're going to say, and I'm telling you, shaddap."

3. "How much more does a hard drive weigh when full?"
"Oh it weighs about shaddaaaap."
Shaddap by Innominate February 1, 2008

Shuddahoe 

When someone is talking about something you do not care about, and you hate them with a passion.Some dum ass. You say, SHUDDAHOE.
Bob :Hi, im bob.

Jim :Shuddahoe i dont give a fuck.
Shuddahoe by Very large cock November 9, 2007
An extreme form of human failure, know to be attracted to dave matthews, phish, bruce springsteen, vireo, and o.a.r.. Can have many personalities including spider man and the infamous sloppy joe. Love to walk around in socks and lift weights. Must also love blue. Tend to be gone.
"Wow who calls a Bagle a Bagul?"
"A Shudda."

She is a really controlling person, but she always ends up with Shuddas.
Shudda by Joe Cuff Cayemberg February 4, 2009
what you tell a jerk off to do
Shuddup you stupid prick!
shuddup by gobo June 2, 2003
what Donald Duck says to Goofy Dog.
Goofy: Gawrsh.

Donald: Awh, shuddup you big Palooka!!
shuddup by Victor Van Styn August 14, 2005

shuddafuckup

A phrase that has been shortened to two syllables, meaning shut the fuck up mainly used to annoy friends by saying it non-stop whenever they try to talk.
Amanda: Hey, guess what I did today, I went -
Alex: shuddafuckup.
Amanda: you shuddafuck up!
shuddafuckup by Amanda Is Cool January 18, 2009
More from Urban Dictionary
A girl who does ballet and only talks about ballet. Her schedule is filled with dance classes which does not allow her to do any other activity.
"Hey, do you know that girl Sally?"

"Yeah, she's kind of annoying. All she ever talks about it ballet."

"Wow, what a Bunhead."

"Hey Sally, you want to hang out this weekend?"
"I can't, I have dance."
"You're such a Bunhead."

"Yeah... I know."
Bunhead by Jen00 October 24, 2014
Word of the Day on October 6, 2026

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
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
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