runawayproblem

noun
UK /ˈrʌnəweɪ ˈprɒbləm/
US /ˈrʌnəweɪ ˈprɑːbləm/

A problem that keeps getting bigger and bigger and is hard to stop.

The messy room became a runaway problem when nobody cleaned it for a week.


OTHER MEANINGS

2. A situation that grows too fast to control, like a fire spreading.

The small leak turned into a runaway problem and flooded the whole basement.

3. A worry that keeps getting worse because no one fixes it.

His fear of tests was a runaway problem until he asked for help.

4. Something that keeps causing more trouble the longer it is ignored.

The broken fence was a runaway problem because the sheep kept escaping.