Definition of dumpers:
(n) :
A small vehicle often used to carry loads and material around, often on building sites; a dumpcart.
(n) :
One who dumps a boyfriend or girlfriend; the one of a romantic couple who terminates the relationship.
(n) :
A dropper of refuse, particularly not in landfill or recycling sites.
(n) :
(slang) A person's buttocks.
(n) :
(computing) A program that outputs the contents of storage or a data structure.
(n) :
(surfing) A wave that knocks a surfer into the water.