tune up (something)

to adjust an engine or vehicle so that it works as well as possible.

I haven't tuned up my car in two years.

The motorcycle isn't running right, but she can't afford to tune it up.

• a means to an end
• a medallion man
• a meeting of minds
• a meeting of the minds
• a melting pot
• a merchant of doom
• a mess of
• a mess of something
• a middle-aged spread
• a mile a minute
• a mile away
• a mile off
• a millstone around neck
• a millstone around your neck
• a mind of own
• a mind of your own
• a mine of information
• a miracle-worker
• a misery guts
• a miss is as good as a mile.
• a mixed bag
• a Monday morning quarterback
• a money-spinner
• a monkey on back
• a monkey on someone's back