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To maturbate while driving. This is typically done on long, cross country trips to help pass the time. One must be cautious, as an ill-timed climax can lead to danger to oneself and to others on the road.
Jim: Dude, I got pulled over by a cop and fined $500.
Bill: What happened?
Jim: I was masturdriving down I-81 and the cop saw me.
Bill: Ah shit..
by TKJTG March 20, 2009
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