shut it down 

An expression of incredulity (that you are unable or unwilling to believe something).

Analogous to "Get outta here!" or "You can't be serious!"

"You're moving to Florida? SHUT IT DOWN!!"

shut it down by FrankHasNoName March 6, 2008

shut it down 

also shut 'er down

1) used when someone crosses the line, usually to tell them to shut up
2) said to people that are too loud, drunk, or obnoxiously unfunny

Sarah: "You're mom's a sleazy slut!"
Cara: "Shut 'er down Sarah"
Sarah: "I'm sorry"

shut it down by snw October 3, 2004

shut it down 

To stop working, to chill out, to take it easy, to relax

On fridays our class likes to shut it down and watch a movie.

shut it down by Steve-O April 2, 2005

shut it down 

To take a nap or go to sleep.
Can also be used synonymously with shut up

I am going to go home and shut it down

Hey!! shut it down!!

shut it down by Bret February 28, 2004

Shut it down 

Shut it down.

Said by a friends father that has an hilarious wisconian accent.

Jash (supposed to be pronounced as Josh), Jash! Shut it down!
You need to shut it down jash!
Jash, shut it down man!

Shut it down by learningisforthebest February 5, 2014

Shut it down 

When Missy has had enough and wants to sleep

I need to sleep so shut it down Jay

Shut it down by Knuckle crew January 11, 2017

Shut it mister

Shut up and read

Matt: wtf
mom: SHUT IT MISTER

Shut it mister by Aaaaaabored May 21, 2021