Language: en
Meaning: (transitive)To makeadjustments(to anengineor bicycledrivetrain) in order to improve itsperformance.; (intransitive)To makepreparationsfor vigorousexercise; towarm up.; (intransitive)To begin to sing or play music.; (intransitive,music)Totuneone's instrument in preparation for performance.; (chieflyUS,transitive,idiomatic)Tobeat up(someone).2007, Michael Berish,Reflections from the Pit[1],→ISBN:“We finally stopped roustin' him and decided totune him upinstead, every chance we got.”“Tune him up?”“Yeah, that's an expression for beatin' the living dog shit outta somebody.”2015, Joe Peters, Bill Fleming,Code Black,→ISBN,page264:“I mean, I had totune her upa bit. She bitched a lot and never did any work. Sometimes, you know, you just gotta get their attention, whack 'em a little."2017,Jeff Gulvin,The Contract: A John Q Thriller[2],→ISBN:[T]hey couldn'ttune him upbecause the murder had to look like he died in his sleep.
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Sourced from Wiktionary