The act of shutting your fucking mouth in the past tense firm
The sophomores shutted up because we, juniors, hate them and we made them.
by Blondie_xoxo February 24, 2015
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Expression of incredulity. Similar to "no way" or "Wow, I can't fucking belive it"
What? My lazy ex got a job? Shut up!
by bob May 20, 2003
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1. A rude way of telling someone to be quiet

2. A way of sayin that you have lost the argument but you are to afraid to admit it
1.

Shut up larry

2.

You- you are such a cunt
Me- well at least i know what a cunt looks like

You- shut up
by Henry832 February 23, 2016
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1) when someone is talking about something that nobody cares about and is giving to much information

2) when someone is talking and you say "shut up" just quiet enough for them to not hear it but they ask "what did you say?"

(usually said calmly. not exclaimed and never to loud. UNLESS they ignore you then you say it louder.)
dude 1: I have to go the play after school because my teacher said she'd give me extra credit, and I need it because I'm failing and my dad says--

dude 2: shut up.

dude 1 : that I wont get my lisence if I dont pass--

dude 2: shut up!

mother: I have a list of chores for you to do that I left on the counter and I want them--

me: shut up.

mother: done when... what did you say?

me: whaa?
by duffffmaann May 23, 2010
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shut·up (shuht-up)
--interjection
1. An expression of disbelief.
2. Amazement; astonishment.

Also,

--adjective
1. An intensive used to express satisfaction, acceptance, pleasure, excellence, exaltation, approval, awe, or reverence- the level of satisfaction is proportional to the charismatic level of the expression.
For instance, you arrive at a boring kids carnival, you'd rather be golfing or fishing, but across the way you see it..."Shut-up, they have blue cotton candy".
by Michael DeFant September 22, 2007
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