Select the most appropriate meaning of the given idiom.

Poke one’s nose

Interfere or meddle

The most appropriate meaning of the idiom "poke one's nose" is to interfere or meddle.

The other options are incorrect.

• "Not be careful about one's health" is not the same as poke one's nose. Not being careful about one's health is a matter of personal responsibility, while poking one's nose is an action that involves interfering in someone else's business.
• "Do unhygienic things" is not the same as poke one's nose. Doing unhygienic things is a matter of personal hygiene, while poking one's nose is an action that involves interfering in someone else's business.
• "Tease or irritate" is not the same as poke one's nose. Teasing or irritating someone is a form of bullying, while poking one's nose is an action that involves interfering in someone else's business.

The idiom "poke one's nose" comes from the idea of someone sticking their nose into something that does not concern them. In the same way, someone who is poking their nose is someone who is interfering in someone else's business. For example, you might say that a nosy neighbor is poking their nose into your affairs if they are always asking questions about your personal life.