Definition of "saddleback"

A saddle-shaped ridge forming a shallow pass between two peaks.  examples

A roof in the same shape, having a gable at each end.  examples

(architecture) A coping that is thicker in the middle than at the edges.  examples

Any of various creatures having a saddle-shaped marking on the back.  examples

A breed of pig which is black with a pink saddle-shaped marking.  examples

(geology) An anticline.

(UK) The great black-backed gull.  examples

(New Zealand) The bird Philesturnus carunculatus.  examples

A variety of domestic goose.  examples

A raccoon oyster.  examples

The harp seal.  examples

The larva of the bombycid moth.  examples

saddle-backed  examples

saddle-backed  examples

(slang) To engage in anal sex with the intention of preserving one's virginity (chiefly by Christian teenagers)