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1.
1) Used to describing rocking a jerk-off.

2) Jerking off; performing masturbation; on your cock.
Man; I couldn't sleep... Had to rock a J to get tired.

Gonna eat; go home; and rock a J.

Dude; I rocked 3 J's last night.
by Googly Gee January 02, 2011
4 1