The action of covertly masturbating with others around. Most commonly perpetrated by individuals taking part in a point based masturbation game. The more unaware individuals around when sneakajacking the more points received by the sneakajacker.
"The secret service failed to thwart my sneakajack while I was sitting inside the podium while the president gave his last speech about the war."
by SheriffKLap August 31, 2013
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