n.  a joke or saying that has meaning to a few select people on the 'inside', and none to anyone else.  Generally very annoying; try searching for a definition on Urban Dictionary without running into at least one.  You'll find you can't.
OMG, Jenna somerville is da shiznit!  Her name is, like, synonymous with tool.  I hate Chris because of a stuffed animal named purple nurple
by =west= December 8, 2003
 Get the inside jokemug.
Get the inside jokemug. by sir climer the great May 11, 2017
 Get the inside jokemug.
Get the inside jokemug. A joke, usually between no more then 10 people, and usually sounds like complete nonsence if you are not part of it. Usually, It is something that happened or what someone said that was really funny at the time.
If someone who was not there when whatever happened, and are told the story of what did, it doesn't count as an inside joke with that person.
If someone who was not there when whatever happened, and are told the story of what did, it doesn't count as an inside joke with that person.
Rachel: Lightly toooooast
Olivia: Hahahaaa
Alyssa: What?
Olivia: Inside joke
Jill: Heee-yaa!
Omi: Hahahaa...Hee-yaa!
Jill: No. you can't do it. you weren't there.
Olivia: Hahahaaa
Alyssa: What?
Olivia: Inside joke
Jill: Heee-yaa!
Omi: Hahahaa...Hee-yaa!
Jill: No. you can't do it. you weren't there.
by IcedTeaaaa August 17, 2009
 Get the Inside Jokemug.
Get the Inside Jokemug. Person: Hi. Did you take that test? I think I got that one about elephants totally wrong!
Group of annoying people: PURPLE ELEPHANT!!! *burst out laughing*
Person: Ummmm....
Group: Its an INSIDE JOKE. We can't tell you what it means!
Person: I don't care what it means.
Group: GOOD CUZ WE'RE NOT TELLING YOU!
Person: Umm okay...
Group of annoying people: PURPLE ELEPHANT!!! *burst out laughing*
Person: Ummmm....
Group: Its an INSIDE JOKE. We can't tell you what it means!
Person: I don't care what it means.
Group: GOOD CUZ WE'RE NOT TELLING YOU!
Person: Umm okay...
by 3RDIE November 26, 2010
 Get the inside jokemug.
Get the inside jokemug. by Xxjoe_mamaxX October 19, 2021
 Get the An inside jokemug.
Get the An inside jokemug. by The man of blood and death November 18, 2018
 Get the inside jokesmug.
Get the inside jokesmug. The mortal enemy of the urban dictionary, since the begging of time, when they were just infants, urban took joke's stick, then a full on war that lasted 100,000,000 years saw an urban win, because it won urban does not allow insider jokes to exist within it
by HalfSICKO April 12, 2021
 Get the An inside jokemug.
Get the An inside jokemug.