Mad as a March hare, [59], [85]
Make a cat laugh, [187]
Make best of bad job, [42], [129], [146]
Make hay while sun shines, [30]
Make mouth water, [103]
Man in the street, [194]
Man proposes, [142]
Manners change, [25]
Many a little makes a mickle, [136], [154], [184], [208]
Many a true word spoken in jest, [230]