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1.
The process by which a male decides on napping after masturbation
Ill give you a call after my J-Nap
by BrWz9290 May 24, 2010
 
2.
the grimy buildup that occurs on men between the inner thigh and scrotal sack, normally on hot days or when showering infrequently.
Man I wish I'd worn shorts, my jnap is about cheese-like.
by Juan Caballero August 05, 2011