noun
batsu game; forfeit; punishment game
A penalty or silly task imposed on the loser of a game, often in variety shows or among friends.
じゃんけんで負けたら罰ゲームとして変顔をしなければならない。
If you lose at rock-paper-scissors, you have to make a funny face as a penalty.
テレビの罰ゲームはいつも面白い。
The punishment games on TV are always funny.