Code-word euphemism for semen. Combination of "jim" (black slang for "penis") and jam (obvious implication). Often used in polite conversation to add a subtle, humorous sexual reference to a sexual act.
"Frank might be a bit late for dinner. He had to change his pants since he spilled some jim jam on them."
A name of a certain individual who is most of the time a speccy cunt
Some things that can cause you to become a Jim Jam are
-Being called Jamie
-Thinks he/she is the most important person in the world
-Has a mother that wears wigs...
Jim Jam was watching hentai again what a speccy cunt