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1. A philandering herbivorous dinosaur species (full name: Dumpalotopus maximus rex) of the Jurassic era that died out prior to the cataclysmic asteroid event due to its aversion to commitment with the opposite sex.

2. In modern times, used to describe a gigolo type who gets laid often and is rarely with the same babe twice.

See also hit it and quit it
1. At the archaeological dig site we found a complete Dumpalotopus skeleton minus the spine.

2. Dude, Sean gets laid so much from week-to-week with so many different chicks we've resorted to calling him "Captain Dumpalotopus!"
by dookeyboy November 22, 2010
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