To remain unused; not to fulfill its purpose.

plural of go-round

To be turned out to pasture, especially of a horse too old to work. / To go into retirement; to rusticate. / (slang) To take a violent fall, especially of a boxer.

(idiomatic) In a single attempt with no breaks.

(informal) Any hypnotic drug taken to ensure adequate rest before military operations etc.

plural of no-go pill

(UK, slang) To go to another urban district, typically in order to sell drugs

To go to the Devil (as a term of dismissal).

Alternative form of go for the gold

(informal, intransitive, or transitive with on or with) To treat gently and with understanding. / (informal, intransitive, or transitive with on or with) To use sparingly or carefully.