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Estrella Muerta's definitions

Boin

n. Large breasts. A Japanese slang term adapted from a transliteration of the term "boing" which, as we all know, is what good breasts do.
Dave: So much ii boin here at this anime convention, amirite Steve?

Steve: The only "boin" I see is attached to fat dudes, you blind weeaboo. Get some damn megane already.
by Estrella Muerta December 9, 2008
mugGet the Boinmug.

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