Top Definition
During a handshake or hug, to move your fingers around a lot, like you're playing a trumpet.

Also an innuendo for masturbation
Kevin: How's it going?
Handshake with finger movement
Stephen: Whoa, easy on the fingerjazzing.

Kevin had his door locked late at night because he was fingerjazzing.
by nmjohn April 20, 2008
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