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1.
Sexual drive-by. AKA fuck-n-run or pulling a drive by.
He wanted a cum-n-run and I told him no way. I don't do drive bys.
by Jolie St. Laurent April 09, 2006
 
2.
When one very stealthly cums on someone without the other person noticing
It was disgusting. I looked on the back of my jacket to find that I had been a victim of a cum n' run.
by Harry "gMan" G......... September 11, 2007