| moonlighting(fickle, untrustworthy, unprincipled, dirty-dealing) |
| not true to(expression, idiom, fickle, untrustworthy, unprincipled) |
| of bad faith(expression, idiom, fickle, untrustworthy, unprincipled) |
| on the QT(expression, idiom, fickle, untrustworthy, unprincipled) |
| on the quiet(expression, idiom, fickle, untrustworthy, unprincipled) |
| perjurious(fickle, untrustworthy, unprincipled, dirty-dealing) |
| polygamous(fickle, untrustworthy, unprincipled) |
| quicksilver(fickle, untrustworthy, unprincipled, dirty-dealing) |
| snake in grass(expression, idiom, fickle, untrustworthy, unprincipled) |
| stop-at-nothing(fickle, untrustworthy, unprincipled, dirty-dealing) |
| stop at nothing(expression, idiom, fickle, untrustworthy, unprincipled) |
| sub-rosa(fickle, untrustworthy, unprincipled, dirty-dealing) |
| subversionary |
| treasons |
| trustless(fickle, untrustworthy, unprincipled) |
| unassured(fickle, untrustworthy, unprincipled) |
| unbeliever |
| unconverted(fickle, untrustworthy, unprincipled, dirty-dealing) |
| undependable |
| under cover(expression, fickle, untrustworthy, unprincipled, dirty-dealing) |