A word or term submitted by people on Urban Dictionary that usually revolves around a person or thing that very few people other than the submitter actually know about, with said word or term often having a definition that does not accurately or effectively explain what it actually is to people who have never heard of such a thing before
by Unrealistic Trap-like Pervboi February 1, 2018

Illegal. Do not make one into an Urban dictionary definition. They are Jokes that only your friends know.
Me: Ima make a definition only my friends will get.
B-B-Birthday party: A place where you hide all the dead bodies.
Urban dictionary: FBI your under arrest dor illegal possession of Inside Jokes.
B-B-Birthday party: A place where you hide all the dead bodies.
Urban dictionary: FBI your under arrest dor illegal possession of Inside Jokes.
by udontknowmeidontknowu January 4, 2021

Urban dictionary: "Don't name your friends. We'll reject inside jokes and definitions naming non-celebrities."
Me: "Ok."
Me: "Ok."
by Potatoes and Milk October 16, 2023

Person 1: Remember when…
Person 2: Shiiit I remember haha.
Person 3: What the fuck are you guys talking about?
Person 1: You weren’t there to see it, it’s an inside joke.
Person 3: Fuck well don’t I look dumb.
Person 2: Shiiit I remember haha.
Person 3: What the fuck are you guys talking about?
Person 1: You weren’t there to see it, it’s an inside joke.
Person 3: Fuck well don’t I look dumb.
by J4VA January 3, 2023

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.
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

i dont know if this us an inside joke
by Apaoapaeowiskwiaow. February 21, 2022

by I like cheez-it June 26, 2022
