Top Definition
a callus or rough spot built up on the skin of the palm do to frequent pleasuring of oneself, thus causing irritation (in the form of chafing) to the penis.

a masterbation catch-22.
Numerous jerk-off sessions caused a chubby chafer to form on my palm two days into my internet porn subscription. The friction it caused really irritated my penis.
by Fist Of Fury April 03, 2008
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