Whac-A-Mole is a game where players use a hammer to hit plastic moles as they pop up randomly from various holes on a game board. The objective of the game is to hit as many moles as possible within a set time limit, typically around one minute.

The game is often found in amusement parks, arcades, and carnivals, and can be played by people of all ages. It requires quick reflexes and hand-eye coordination, as well as a bit of strategy to anticipate where the moles will pop up next.

Overall, Whac-A-Mole is a fun and challenging game that can provide hours of entertainment for players.