also time-bomb
(~s)
1.
A ~ is a bomb with a mechanism that causes it to explode at a particular time.
N-COUNT
2.
If you describe something as a ~, you mean that it is likely to have a serious effect on a person or situation at a later date, especially if you think it will cause a lot of damage.
This proposal is a political ~ that could cost the government the next election...
N-COUNT: oft adj N