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A woman or man that does not fall into the category as fat or skinny. In other words, the perfect body shape.
List of celebrity examples. Scarlett Johansson, Jennifer Aniston, Jake Ggyllenhaal, Beyonce, Britney Spears, Brad Pitt, Bradley Cooper, Gerard Butler, Reese Witherspoon, Nina Dobrev, Paul Wesley, Ian Somerhalder, and so on and so on.. all are inbetweeny.

1) Damn, that sexy woman is perfectly inbetweeny.

2) Taylor Swift is hot, but I wish she was more inbetweeny.

3) Im looking for a man who isn't too big or too small. Something inbetweeny.
by XJadedAngelX May 05, 2010
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The area between the ball sack and the arsehole.
"What with this hot weather we've been having, my in betweeny gets terrible sweaty, but it really isn't on to do so in public, so one must simply suffer on..."
by Chimpitic June 04, 2006
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In BetweenyTo sneak in a drink between shouts.
Dont have to many In betweeny's Frankie or you'll fall over.
by Adam Bunyip March 04, 2005
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