Someone who takes a massive shit on the side of the road and then ditches it.
oh yeah man john is such a dumper
Using smoked ciggie butt tobacco to make a new ciggie. (Australian)
A person on Flickr who
1.) posts a large number of photos to a given group.
2.) posts off-topic photos.
The purpose is to maximize exposure.
That guy who posted photos of every freeway exit sign in California to the Orange County group was an annoying dumper.
When someone drops a fucked up project on your plate at work to deal with and then walks away completely - shit dumper.
Danielle dropped this clusterfuck of a project on my plate and walked away unscathed - shit dumper.
When someone you're dating is rude and disrespectful to you so realizing you'll probably be dumped sometime soon you abruptly end the relationship rejecting that person before he/she can reject you.
That gal treats me terribly breaking dates at last minute with lame excuses and ignoring me when we're at social functions so I'll be dumpering her today.
A significantly large, crispy, succulent crab Rangoon.
Waiter: Here are your rangoons sir, enjoy!
Me: Aw man, these big crabby dumpers look delicious!