Definition & Meaning of "[fly] in the teeth of {sth}"

What is the origin of the idiom "out of step with someone or something" and when to use it?

The idiom "out of step with someone or something" originated from the literal notion of marching or walking in a synchronized manner. The phrase is used to signify a lack of alignment or compatibility with a person, group, or situation, suggesting that one's actions, beliefs, or behaviors are not in harmony or agreement with the prevailing norms, expectations, or values.