The act of excreting in a public restroom and immediately exiting without washing ones hands.
Bill just pulled a Dump n Dash, if I were you I wouldnt grab one of those bagles this morning.
by Chunk2 June 16, 2008
The newest viral craze. To play, just go into your favorite eating establishment and take a Dump & then Dash out, making sure to take a picture of the restroom in question, then posting it to Facebook and/or Twitter! More fun than planking, coneing and owling combined!
Guy #1: "Why are we stopping at Olive Garden? Are you picking up a to-go order?"

Guy #2: "No, I just need to do a Dump n Dash!"

Guy #1 "Go for it, I can't wait to see it on FB!"
by Droppin' It Low July 19, 2011
A saying menaing that after Fucking either the Guy or Girl makes an immediate exit after the male blows his load! A Dump 'N' Dash could be the end result of a condom catastrophe or could in the future result in a Bastard Baby or STD Stunner!!!!
Last night I met this Girl but she was just a Dump 'N' Dash!
by Forever Fun 'N' Faitful August 29, 2009

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