to be unpleasant and to have a bad effect on other people or situations.

I've worked with her in the past and I'm telling you she's bad news.

The government's failure to be firm on air quality is bad news for the environment. (often + for)

• dawn on you
• day after day
• day and night
• day by day
• day in, day out
• day late and a dollar short
• daylight robbery
• day of reckoning
• days are numbered
• day-to-day
• dead as a doornail
• dead duck
• dead end
• dead-end
• dead hand of
• dead hand of something
• dead in the water
• dead letter
• Dead men tell no tales.
• dead of winter
• dead on arrival
• dead ringer for
• dead ringer for someone
• dead ringer for something
• dead set against