1 definition by Jack Mann

Top Definition
A word made up by Planet Fitness used to describe one who grunts, drops weights, and judges. At planet fitness there is a lunk alarm that will go off if they believe you to be a lunk.
Ryan is slamming his weights wearing a body building tank top and drinking out of a gallon water jug, what a fuckin lunk!
by Jack Mann March 06, 2008

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