1 definition by Estrella Muerta
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.
Steve: The only "boin" I see is attached to fat dudes, you blind weeaboo. Get some damn megane already.
by Estrella Muerta October 18, 2008