Top definition
the motion your fingers make when finger banging a female. When your fingers are fully inserted straight in, you curl your fingers back in a J like form. Technique is everything.
Soey was bangin a chick when he busted out the J stroke and made her cum all over mike who was filming.

Your Canadian when u know what a J stroke is.
by PIKACHU'SBONER March 17, 2009
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