When you say something stupid and your friends won't let you forget it, so they say it too.
Me: Mr. Sir are you ok??
Friends: Oof that'll be a new inside joke
by marshmewwew November 21, 2018
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a joke that is formed with a select few people. Later when a certain word is shouted (like ex. cheese grater) the people "inside" will laugh hystericly while others will only be confused.
some inside jokes with my friends

cheese grater
bam!
its huge!

see? if i said that you wouldnt get it, but my friends would
lol
by noob killer! hax October 3, 2005
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a joke only understood by an exclusive group of people.. usually they are used to annoy/leave out/embarrass/show off, to outsiders who don't undertand
John: "hahahha!! remember!!??! do you want fries with that??"

Jane: "oh my god!! HAHAHAH! we are so funny, that's a great inside joke!!"

Outsider: *aw i don't get it.. i feel so left out*
by Godluvsugly July 9, 2009
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A Joke that only a few people will ever get. Ever. Ousiders never find them funny once they're explained, because you had to bee there at the time.

Me and my bffs Meg, Rea, and Oceana (collectivley known as NEN have a lot of inside Jokes.
The inside jokes of NEN include....(:)

No Explanation Needed,
N00blet,
Blondie and her dancing Ns,
Oreo-chan,
Red Skinned Potato,
Curtains,
Diction-rea,
Add an A,
Y intercept,
Bat-tree,
DORM,
And many more....
by Desire Lupin June 19, 2009
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An inside joke is a joke only understood and funny to only two or more people or a specific group. No one else other than that group will understand the joke and when they do, they will almost always not find it funny. They are usually jokes where "you had to be there" to even find it remotely funny.
A group of friends are walking around at the mall.
Girl 1: Trash can!!
(group bursts out in laughter except for one other girl)
Girl 2: why's that funny?
Group: Inside joke...
Girl 2: Okay then...
by Your Username Here October 15, 2009
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A joke that only two or more people will understand. It's meant to stay within the group, hence the name "inside joke." Inside jokes are usually made out of random situations and come about on accident. Friends could have entire conversations about just one inside joke. These kinds of jokes are also so much fun to joke about! Inside jokes really bring you and your friends closer together and let you be more comfortable with them and other people
(the example below is actually based off of something that actually happened in Spanish class with me and my friend)

Spanish teacher: Alright class, turn to page 136 in your textbooks. These are verbs with irregular yo forms. Repeat after me. "Hago"
Class: "Hago"
Spanish teacher: "Salgo"
Class: "Slago"

Spanish teacher: "Traigo"

Class: "Traigo"
Spanish teacher: "Pongo"

Class: "Pongo"
Me: (Smiles and tries to hold back laughs as I look across the room at my friend who is also smiling)
Friend: (Mouths this) Pongo the penguin
Me: (Starts to giggle)

Person sitting next to me: What's so funny?
Me: It's an inside joke! Sorry lol
Person sitting next to me: Ok then...
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A joke with your best friend that you can laugh about for ages. Other people never get it when you explain it to them.
She is my best pigeon cheebie.
what?
That's an inside joke
by E&F March 19, 2016
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