war horse

(noun) a work of art (composition or drama) that is part of the standard repertory but has become hackneyed from much repetition. Synonyms: warhorse.

(noun) an experienced person who has been through many battles; someone who has given long service. Synonyms: veteran, old-timer, oldtimer, old hand, warhorse, old stager, stager.

(noun) horse used in war. Synonyms: warhorse.