(usually with on, upon, etc.) The back of a horse. / A ridge of sand, gravel, and boulders.

On the back of a horse.

Alectis indica (Indian threadfish) / Atule (certain scads) / Caranx spp. (certain trevallies) / Carangoides spp. (island jacks) / Gnathanodon speciosus (golden trevally)

(idiomatic, US) A muscle cramp, usually in the thigh or leg.

An apparatus for gymnastic exercises with a cylindrical body covered with leather and two upright pommels, as hand grips, near the centre; held upright with adjustable legs.

(gymnastics) An apparatus with an upholstered body but no pommels; since about 2000 replaced with vault, also called vaulting table.

(idiomatic) To persist or continue far beyond any purpose, interest or reason.

(Britain, idiomatic) To attempt to get more out of something that cannot give more; to attempt to arouse fresh interest in something that is either hopeless or already settled.

You can show someone how to do something, but you can't make them do it.

(idiomatic) To put things in the wrong order or with the wrong priorities; to put something inconsequential as more important than something more essential.