noun. a stoppage or slowing of motion, work, or the like, due to obstruction, overloading, malfunction, or inefficiency; jam: Your letters didn't go out yesterday because there was a jam-up in the mail room.

What does Jam mean in slang?

(one's) jam

slang A song that one loves or likes a lot. Yo, this is my jam! Turn it up! 2. slang Something one particularly prefers, desires, enjoys, or cares about.

What does jammed up mean in slang?

glutted; full of food or drink. I'm jammed up. I can't eat another bite. See also: jam, up.