The best thing to say when someone annoys you.
Tom: Hey do you wanna play lego with me!
Me: SHUT UP AND GO AWAY
When shut up isn't enough to shut someone up.
You got games on your phone?
Shut your up, Kevin
The best way to assert your dominance, you're too much of a badass to say "shut your mouth", or "shut up". shut mouth is a legendary term used by only the most epic of gamers.
nahh nahh shut mouth
- boi during an argument
A great way to greet your boss or other superiors
Boss: Hey Mike!
Mike: Shut up retard!
A phrase used do to the pre notion of someone saying something stupid, obnoxious, rude, or negative.
Matt walks in the door with a disgruntled look on his face. Liz is getting the kids ready for bed. The dishes aren't done.
Matt: thinking to himself "why aren't the dishes done?"
Liz:" shut your thoughts up!"