Twenty idioms about dishonesty

Kick down the ladder and break your word.

Talk with honey, talk nonsense and be capricious.

Be ruthless when you turn your back on me. What you say is not true, but what you say is not true.

Treason, betrayal, betrayal, betrayal, betrayal, betrayal, betrayal.

Eccentric, eccentric, half-hearted, eccentric

Forget your faith, turn your back on your justice, turn your back on your ingratitude.

Go back on your word, but don't believe it.