1 definition by El Z Magnifico

Top Definition
To masturbate/wank/spanking the monkey.

Started life as as the word "Jaff" but evolved into "Yaff" after some Spanish influence.
Z: Where have the tissues gone?
J: Melvin took them into his room to yaff.

Z: What's Melvin doing?
J: He's yaffing.
by El Z Magnifico October 31, 2004

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