escape hatch
nounUK /ɪˈskeɪp hætʃ/
US /ɪˈskeɪp hætʃ/
A small door you can use to get out quickly.
The submarine had an escape hatch on top.
OTHER MEANINGS
2. A way to avoid a difficult situation.
The contract gave him an escape hatch if the deal failed.
3. A small opening in a vehicle or building for emergency exit.
The crew climbed out through the escape hatch.
4. A means of leaving a bad or trapped situation.
Learning new skills gave her an escape hatch from her boring job.