[walk out] {v.}
1. To go on strike.
* /When the company would not give them higher pay, the workers walked out./
2. To leave suddenly; especially to desert.
* /He didn't say he wasn't coming back; he just walked out./
- Often used informally with "on".
* /The man walked out on his wife and children./
Compare: LEAVE FLAT, LEAVE IN THE LURCH.