1. Used as a replacement for the words fuck, bitch, stupid, gay, etc.
2. A stupid method of trolling started on a Minecraft skin app in late 2017 by putting a huge mouth and huge eyeballs on skins with sometimes period blood, piss, or shit, poorly drawn titties, etc. to piss off 12 year olds. AKA "putting someone in a jar."
3. Used as an insult.
1. Katteh: SHUT THE JAR UP YOU JARRING JAR !1!
John: ???
2. Steve: Look at the jar skins i posted on that stupid skin app last night. So many people got triggered lmao.
Katteh: I WILL PUT YOU IN A JAR !1!1!
3. Steve: You stupid jar.
Katteh: no u lmao xd