A jar that has been cummed in over a estimated amount of time from 1 week to infinity
John: Mary! Look at my cum jar it’s almost full!
by Penis Nigga January 9, 2019
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A cum jar is a jar filled with cum, yup, cum. It is a meme were someone puts a figure and busts a nut on it in a jar
John: What's that?

Gerald: That's my cum jar
by SoLegoPornExists November 20, 2020
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A Jar or bottle of cum that is stored and filled up over a long amount of time to then be used to pour over someone else or a figure a girl from anime.
Ladies and gentlemen i would like to introduce you to my Cum Jar...I have waited my entire life for this! *makes orgasm noises while squirting cum out of jar*
by TheExplodingEevee October 2, 2017
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The Cum Jar is the way for the men to pay respect to the hundred, the thousand of babies that will never been born, sending their semen to rest in that untouched sanctuary.
- Honey, mom gave me this jam jar with Jar Jar on it as a present for you
- I will put it into good use, I will make it my next cum jar. Real men use cum jars. Not sockets.
by obso September 5, 2019
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A rotting corpse that is being used as a storage for blowing loads of semen into the rotting vagina or anus. Corpse will be suspended in a way so no semen can drip out of the orifices.
I miss having deep conversations with my wife, but before she died she said I could use her as a cum jar for as long as I want.
by thejewishniggernazi January 15, 2018
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When a person has been shrunk down to a small size, their friend will put them in a Platonic Cum Jar (PCJ) for safe keeping
“I saved his life, if it weren’t for my Platonic Cum Jar, someone would’ve stepped on him”
by DonkeyKill July 31, 2021
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the rainbow dash cum jar is a reddit post that depicts a rainbow dash figurine submerged in a mason jar full of cum. the owner of the jar would frequently update the posts and show the cum that has been added. the jar was later accidentally boiled over a space heater, turning the liquid brown.
“have you heard of the rainbow dash cum jar?”
by epic bruh moment February 29, 2020
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