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1. (n)A term used in place of a another heavy insult to avoid the trouble associated with the replaced insult
2. (n) A way to describe female masturbation (shortened from knuckle beat)
(In the presence of authority) God jack, you are such a nuckbeat for stealing that iPod.

You shoulda seen this porno I got man, this hot chick was throwin a nuckbeat.
by Paul Jananananana August 11, 2007
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