shaddap 

A moldy turnip employed in the silences of one or more morons.

Be silent or I'll make you Shaddap

shaddap by Darian_TruBlade October 28, 2003

A SHADDAP 

The same as OH SHUT UP

me: sup
frirnd: nun much
me: A SHADDAP
frirnd: Y FRIRD?
me: JUST SHADDAP!

A SHADDAP by Rill GiktokExcelticus October 20, 2019

shuddup

the cool kid "idgaf" way of saying shut up

Friend: AHAHAHAH YOU HAVE SUMMER SCHOOL
Me: shuddup*emoji spam to emphasize the "idgaf"*

shuddup by superswaggyawesomeboy August 10, 2020

shaddap 

What you grumblingly mutter under your breath when a self-proclaimed rod-'n'-reel expert boastingly launches into one of his infamous "fish stories", and your tall-tale-weary eardrums sorely wish dat he would just quit flappin' his gums for once.

Bombastic angler: I **fish**, therefore I **lie**!
Listener: Aw, shaddap...!

shaddap by QuacksO January 1, 2022

shaddu 

shaddu is just a game badger and is known worldwide. He puts cars on hire. Whenever he has beef he says “ask about me, my names Shaddu from Oldham”

“Yes shaddu what you saying”

shaddu by shaddulini the 3rd January 17, 2024