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addaword.gifdefinition of underbum

noun
the lower part of the buttocks, especially when revealed by very short shorts
The underbum is bold and brazen, in a lollipoppy, Katy Perry or Rihanna kind of a way.
Submitted from United Kingdom on 11/07/2014 18:42:00
Definition of underbum from the Open Dictionary – a public resource hosted by Macmillan English Dictionary Online

protologism

a new word or phrase invented in the hope that it will become generally used

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