accident waiting to happen, an

an accident waiting to happen

A person, thing, or situation that appears to be imminently dangerous or troublesome. Often but not always used somewhat humorously. Don't leave that ladder in the middle of the yard, it's just an accident waiting to happen! My toddler is starting to walk now, and she is just an accident waiting to happen.
See also: accident, happen, waiting
Farlex Dictionary of Idioms.

an accident waiting to happen

COMMON
1. If you describe a situation or activity as an accident waiting to happen, you mean that they are likely to be a cause of danger in the future. A lot of the city's buildings are accidents waiting to happen. The sudden explosion of a real bullet on stage during the play was an accident waiting to happen.
2. If you describe a person as an accident waiting to happen, you mean that they are likely to cause trouble or have bad problems. He was getting a reputation for being wild — an accident waiting to happen.
See also: accident, happen, waiting
Collins COBUILD Idioms Dictionary, 3rd ed.

an accident waiting to happen

1 a potentially disastrous situation, usually caused by negligent or faulty procedures. 2 a person certain to cause trouble.
1 1997 Times Accidents are often said to be ‘waiting to happen’. It does not take much imagination to see that the chaotic start to the Whitbread round-the-world race…could easily have ended in tragedy.
See also: accident, happen, waiting
Farlex Partner Idioms Dictionary

accident waiting to happen, an

A recipe for disaster. The phrase is used for such diverse circumstances as a large pothole causing an auto accident, an airplane flight on a collision course, or a small leak that ends in a billion-dollar oil spill like that in the Gulf of Mexico in 2010. It appears in the lyrics of several popular songs, such as the one quoted above.
See also: accident, waiting
The Dictionary of Clichés by Christine Ammer
See also:
  • an accident waiting to happen
  • an accident/a disaster waiting to happen
  • how the mighty are fallen
  • how the mighty have fallen
  • believe it or not
  • bion
  • this just in
  • will wonders never cease
  • wonders (will) never cease
  • wonders will never cease