Acronym for junior partier. It is used to describe someone who is not down for a party or fun time. Someone who will not partake in fun events, drink more beer, etc.
"Hey James, you want to see who will have a longer keg stand?"-Mike
"Naw dude"-James
"Dude, don't be such a jp."-Mike
"Fine, let's do it"-James
a fuked up son of a bitch who is impatient and lieks to masturbate when nobody is around. he thinks to be straight when deep down inside he like to swallow semen JP is usually asian name that is an annoyingdouchebag and likes to bother people when they need to finish important stuff.
1.One who likes to smell the same sexes anus, and likes to masterbate with small mellons. 2. love to be shitted and or play with his/her own shit. 3.!! gets off to animals breading.