| Rat on |
| Backstab |
| Sell out |
| Disclose |
| Be disloyal |
| Two __ time |
| Double cross |
| Emulate Judas |
| Tell secrets. |
| Violate trust |
| Be disloyal to |
| Violate a trust |
| Manifest; reveal |
| Stab in the back |
| Unknowingly reveal |
| Throw under the bus |
| Accidentally reveal |
| Sell down the river |
| Deliver by treachery |
| Reveal (intentionally or unintentionally) |