Jimmy Jam is another word for Music or Song.
Guy: "Dude, you gotta listen to this jimmy jam!"
Dude: "Bruv, is that Post Malone, my guy?"
Guy: "Ye, man."
by imightberussianimightnotbe April 28, 2017
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Sauce on anything that may come on any food item
Waitress: "What can I get for you?"

Customer: "I want that ten piece blickey (wings) minus the Jimmy Jam!

Waitress: "What is Jimmy Jam?"

Customer: "The sauce baby! The damn sauce!"
by CreamCheeseSpreadEagleEyeBoogy January 18, 2021
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