Explanation:

- Tit for tat: This idiom means to retaliate or respond in kind to an action. It's like doing something to someone that they did to you, often as a form of revenge or retaliation.

- Option 1, Prepare to leave: This means getting ready to depart from a place. It's about packing up or planning to move from one location to another.

- Option 2, A wild guess: This refers to an estimation made without much evidence or information. It's basically guessing without much basis.

- Option 3, Counter attack: This involves responding to an assault or attack with another forceful action. It means to retaliate or respond aggressively.

- Option 4, Go smoothly: This phrase means to proceed without problems or interruptions. It indicates a situation where everything happens seamlessly.

- Option 3, Counter attack is the correct meaning of "tit for tat."