When a girl is so slight and of such small build that when having sex with a man, his penis if of decent size is likely to hit the back wall of her pelvis. Like with basketball, hitting the back board.
Shes a tiny little fitty, i bet i would hit the back board with that one…
A japanesemonster (yōkai) that consists of a shadow with several eyes (sometimes a main and larger one) The shadow expands itself with tentacle-like shapes, that also end in eyes.
If you seeeyes in the middle of a very dark place, it could be backbeard.