1 definition by kikr47
The arch in some chick's backs when standing, showing off their ass. The chick's back curves like a Banana, making her ass appear to be more pronounced than without a Banana Back.
A: Hey, Katie has a nice Banana Back! I could stare at that all day!
B: Yeah, I know! that ass is seductive!
B: Yeah, I know! that ass is seductive!
by kikr47 November 21, 2008