Explanation:

- The idiom "To pull someone’s leg" means to joke with someone. It is often used when someone is trying to tease or playfully deceive another person in a light-hearted manner.

- Option 3: To joke with someone - This is the correct meaning of the idiom. People often use this phrase when they are not serious and are having a little fun at someone's expense.

- Option 1: To talk something bad about someone - This statement is not related to the idiom. It instead refers to speaking poorly of someone, also known as badmouthing or slandering.

- Option 2: To talk something good about someone - This statement indicates praising or speaking well of someone, which doesn't connect to the idiom.

- Option 4: To push a person - This is a literal action unrelated to the idiom, which is figurative.