A common sign that means, contrary to popular belief, that it is illegal to drop off trash in the specified location.  This trash may or may not include human fecal matter.  This sign will never cease to amuse high school kids.
Joey: "Hey, guess what guys?  Check it out!  I just put up a "No Dumping" sign above the shitter in the boys' room!"
Marty: "HAHAHA!!! All right! Awesome joke! You da man!"
Kenny: "Yeah dude, that's totally rad!"
Marty: "HAHAHA!!! All right! Awesome joke! You da man!"
Kenny: "Yeah dude, that's totally rad!"
by Nick D August 13, 2004
 Get the no dumpingmug.
Get the no dumpingmug. When you short a stock, then get up and take a massive dump, only to come back to see that the stock has gone down a lot (dumped)... so you make a lot of monies.
Tom decided to short AAPL, then felt a little queasy from his Chicken Tikka Masala lunch, so he took a massive poo. AAPL's stock price decided to take a dump simultaneously. Now that is what I call a good ol fashioned Dump and Dump
by A.BRUNNY September 19, 2012
 Get the Dump and Dumpmug.
Get the Dump and Dumpmug. by pattypoopy January 24, 2006
 Get the dumpedmug.
Get the dumpedmug. to shit; or the actual shit
by Mrs. Bobby Johnson December 28, 2005
 Get the dumpmug.
Get the dumpmug. by PurpMane June 22, 2010
 Get the dumpingmug.
Get the dumpingmug. by iStrewdle August 9, 2015
 Get the Dumpmug.
Get the Dumpmug. 