| middle of nowhere |
| mile a minute |
| mile-a-minute |
| milk drinker |
| milk of human kindness |
| milling machine |
| mince words |
| mind one's language |
| mind one's own business |
| mind's ear |
| mind's eye |
| miners' canary |
| mines and minerals |
| missing stair |
| mission creep |
| miss the mark |
| miss the memo |
| mistake windmills for giants |
| Mister Right |
| mix apples and oranges |
| mixed bag |
| mixed message |
| mixed picture |
| modest proposal |
| molehill mountaineer |
| mommy brain |
| Monday-morning quarterback |
| money pit |
| money's worth |
| monkey paw |
| monkey's paw |
| Monopoly money |
| month in, month out |
| moral bankruptcy |
| moral high ground |
| moral of the story |
| more cry than wool |
| more's the pity |
| more than meets the eye |
| morning person |
| most an end |
| Mother Hubbard |
| mother lode |
| mouth breather |
| mouthful of marbles |
| move heaven and earth |
| move house |
| move out |
| move someone to tears |
| move the yardsticks |
| move through the gears |
| much ado about nothing |
| much less |
| muddy the waters |
| muddy up |
| mugged by reality |
| mug's game |
| murderers' row |
| murder will out |
| mutual admiration society |
| my arse |
| my foot |
| my skull's afly |
Mac + Safari
iPhone + iPad
Google Chrome
Mozilla Firefox
Opera
Microsoft Edge