Definitions from Wiktionary (tune up)

▸ verb:  (transitive) To make adjustments (to an engine or bicycle drivetrain) in order to improve its performance.
▸ verb:  (intransitive) To make preparations for vigorous exercise; to warm up.
▸ verb:  (intransitive) To begin to sing or play music.
▸ verb:  (intransitive, music) To tune one's instrument in preparation for performance.
▸ verb:  (chiefly US, transitive, idiomatic) To beat up (someone).

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