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

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

(dated, nautical) The period of work on board ship for which the seamen have been paid in advance (usually a month's wages), the end of this term being celebrated by parading a straw horse about the decks.

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.

(by extension) A subversive person or device placed within the ranks of the enemy. / (computer security) A malicious program that is disguised as legitimate software.

(Greek mythology) The hollow wooden horse by which the Greeks allegedly gained access to Ilium/Troy during the Trojan War.

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

(obsolete) The walrus. / Any of various small marine fish of the genus Hippocampus that have a horselike head and swim upright.

(countable) Any of several horse-shaped chalk figures in England, such as the Uffington White Horse.

(idiomatic) Someone who possesses talents or favorable characteristics that are not known or expected by others.