Ψάξε όποια λέξη θες, όπως slope:
 
1.
A woman with a very flat chest, such that it resembles her back. Only the nipples give it away.
The girl at the party was pretty, pity about her two backs.
από DesDDD 24 Σεπτέμβριος 2007
 
2.
A "twoback" is a woman with no visibly protruding breasts. See also: "flat as a board."
Lucy the twoback rarely goes on second dates.

"Is that a stop sign or a twoback?"
από snowshoesny 26 Σεπτέμβριος 2009