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When someone is going to do something really stupid, useless, or annoying, or if you are jealous that someone is getting to do something you're not, it is a put-down. See whatever.
geek: Well, I'M going to get my hair follicle tested for carbon today!

normal kid: Psh, have fun.

Annie: guess what, i get a free shopping spree at neiman marcus today!!

Jenna: psh, have fun.
by Angelacia May 04, 2007
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Jan 26 Word of the Day
a sudden illness experienced on January 20, 2021 when you can’t go into work because you must celebrate the the swearing in of President Joe Biden & Vice-President Kamala Harris signaling the end of the 1460 day hostage situation otherwise known as the Trump Presidency & the defeat of the Potatriot Uprising of January 6, 2021.
I couldn’t go in Wednesday. I had the inauguvirus
by Sonicbo0mz January 21, 2021
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2
a common response for whenever someone announces that they are going to do something totally normal, boring, or routine.
Person 1: I'm going to the bathroom.
Person 2: Have fun!

Person 1: I'm going to pick up some milk at the grocery store.
Person 2: Have fun.
by Katinthehat February 21, 2008
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3
A sarcastic response to someone's unfortunate upcoming situation.
Corey: Hey man, where you headed?
Mike: Fucking physics class...
Corey: Have fun! :D
by TheVurdmeister July 23, 2011
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4
My Bf: How was work?
Me: Awful.
My Bf: I can change that. Wanna have fun?
by jessbrown March 16, 2020
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