That visible, little indentation between one's clavicles and the mark of true beauty. - blinklz

Before anyone goes reaching, brow a-furrowed, for their well-thumbed copy of Gray's Anatomy, allow me to save further wear by revealing that the term 'ucipital mapillary' is in fact completely fictional. Credit is due to screenwriter Samson Raphaelson, who dreamt it up for the 1941 Hitchcock thriller Suspicion. It appears in this memorable exchange between lead actors Cary Grant and Joan Fontaine, as Johnnie and Lina Aysgarth - Lina is buttoning up her blouse:

Johnnie: Don't do that.
Lina: Why not?
Johnnie: Because your ucipital mapillary is quite beautiful.

Johnnie's line is particularly charming because it is so unashamedly invented on the spot.

I can only agree with blinklz's (now deleted) observation that such a line makes an excellent foil should one be so unfortunate as to be caught ogling another's bosom. I'd add that for maximum charm, however, one must affect one's best Cary Grant impersonation. If the object of your indiscretion happens to be a film buff, you may stand a slightly lesser chance of getting bitchslapped.

Props to www.carygrant.net and IMDb.