if you do something day in, day out, you do it every day over a long period, often causing it to become boring.

Life can become very tedious if you do the same work day in, day out.

Dave wore the same tie day in and day out.

• the lull before the storm
• the main drag
• them and us
• the man in the street
• the man of dreams
• the man of the moment
• the man of your dreams
• the man on the Clapham omnibus
• the man on the street
• the matter in hand
• the meat and potatoes
• the men in grey suits
• the men in white coats
• the Midas touch
• the middle ground
• the milk of human kindness
• the mind boggles
• the mind boggles.
• the minute
• the minute back is turned
• the minute someone's back is turned
• the minute that
• the missionary position
• the moment of truth
• the more one thing happens the more