What does Rabbit Hunt mean in poker?

Rabbit Hunt in poker means looking at the cards that would have come next if the hand had continued after a fold or after the action was already over.

How does it work?

In simple terms, the players are no longer competing for the pot, but they still want to see what would have come on the turn or river. It does not change the result of the hand and has no effect on the pot. Rabbit Hunt exists purely out of curiosity: would the draw have got there or not. The term is informal, but very familiar, especially in live poker.