a marriage of convenience
has one meaning- a man of substance
- a man of that stamp
- a man of the world
- a mare's nest
- a marked person
a marriage of convenience
- a marriage of true minds
- a matter of concern
- a matter of opinion
- a matter of s.th.
- a matter of the moment
- a matter of time
- a mile off
- a millstone round s.o.'s neck
- a mind to
- a mine of information
- a minimum of
- A miss is as good as a mile.
- a month of Sundays
- a moonlight flit
- a moot point
- a mother's boy
- a near thing
- a necessary evil
- a needle in a haystack
- a nervous wreck
- A network
- A new broom (sweeps clean).
- a new deal
- a night out
- a nine to five job

