Similarily known as "playing jazz", "listening to jazz". With reference to the type of music known as jazz, there is none. The word is an off-shoot of the word "jizz" (otherwise known as cum, spunk, skeet, etc.) that can be used in a setting where said dialogue may be deemed as inappropriate, to describe the action of ejaculating.
I'm saving up all my jazz to give to my girlfriend tonight.
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