scratch card
noun [ C ] UK uk/ˈskrætʃ ˌkɑːd/ us/ˈskrætʃ ˌkɑːrd/
刮奖卡，刮刮卡
a small card that you can buy to try to win a prize, with a thin layer that you rub off in order to see if you have winning numbers written on it
a lottery scratch card 抽奖刮刮卡