The initial idioms of the letter A

a matter of life or death	a matter of opinion
a matter of record	a matter of time
a meal ticket	a mean something
a means to an end	meat rack
a medallion man	a meeting of minds
a meeting of the minds	a melting pot
meme	a merchant of doom
a mess of	a middle-aged spread
a mile a minute	a mile off
millennial	millstone around (one's) neck
a millstone around neck	a mind is a terrible thing to waste
mind of (one's) own	a mind of its own
a mind of own	a mine of information
a misery guts	A miss is as good as a mile
a mite	a mixed bag