tìm từ bất kỳ, như là lemonparty:
 
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.
viết bởi DesDDD 24 Tháng chín, 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?"
viết bởi snowshoesny 26 Tháng chín, 2009