A joke pertaining to a friend group or online community, through which it is exchanged exclusively. Similar to memes, but more specific to a smaller, more clearly-defined group of people.
friend 1: "Guess it's time for you to go get your own boat, then!"
friend 2: "Ha! You smartass, you!"
stranger: "Uh... was that a joke or something...?"
friend 2: "Oh, it's just a silly little inside joke. Don't sweat it."
by Inlovewithabsol July 27, 2023
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When a small group of people make up a joke (a phrase) while no one else is there (Sometimes because of an event that occurs, and then someone says something and it becomes an inside joke) and don't tell anyone about it, so every time anyone (whether from the group or not) says the phrase, they all start laughing like idiots for an unknown reason. It completely baffles people outside this group why it would be remotely funny. Most of the time it confuses them, or annoys the crap out of them.
Jeff started cracking up for no reason when I said "jelly"

Like wtf? Is that an inside joke?

Person 1: So I spread mayonnaise on my turkey the other day...
Person 2: Ahaahaahahahah!!! MAYONNAISE!!!!
Person 1: Wha-

Person 3: DID HE JUST SAY MAYONNAISE??!! AHAAHHAHAHAHAH
Person 1: Um??

Person 1: I checked out books from the library for my little brother, he seems to like The Very Hungry Caterpillar
Person 2: HAAHHJHSHJAHJDJHGGJDG HAHAAHHAHAHHA S SHAHAHAHAHAHHA

Person 3: *wheeze*
Person 1: .....

Person 1 walks away
by Uncreative Blob February 7, 2018
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Everyone seems to be in on it except you
Person 1: Ugh what did you get on the math test?
Person 2: Utah, duh.

Person 1: HAHAHA THATS SO FUNNY OMIGOD
Person 3 (you): Um how?
Person 2: *sighs dramatically* It's an inside joke.
by bobTheBuilder322 December 4, 2020
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some sort of weirdo bull shit where 2 "best friends" make a foolish joke only they know

for example
person 1: garlic with chicken strips

person 2: BAHAHAHAH

person 3: whats so funny

person 1 and 2: its a inside joke u won't understand
by marie8829 March 20, 2023
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a joke made by 2 or more people that only that group understands! even if you explain it to other people they might not find it as amusing as you would.
Person 1: "ahaha horsepower"
Person 2: "what??"

*inside joke is explained*

Person 2: I don't get it
Person 1: it's an inside joke
by imBDS December 20, 2019
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the thing that urban dictionary rejects. 👁👃👁

⭕️🗯
Cardi: yo these inside jokes funny af
B: wtf are the jokes?
by AnyaForger May 8, 2022
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The thing that Urban Dictionary hates and will not let you publish a definition if it includes an inside joke
by nabrU yranoitciD January 13, 2020
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