(figuratively, idiomatic) To return to a previous state.

A condition characterized by chronic pain after back surgery.

A typically men's haircut where the sides and the back are left shorter than the top of the hair.

(mineralogy) A saddle reef: a saddle-shaped bedded mineral vein in the form of an anticline or a syncline (an inverted saddle).

plural of saddle back reef

Third-person singular simple present indicative form of have someone's back

present participle of have someone's back

simple past tense and past participle of have someone's back

To support someone who will succeed.

A slap. / (idiomatic, figuratively, by extension) A display of disrespect or scorn.