- a chemical substance made from hot peppers that causes somebody's eyes, nose and throat to sting (= be painful) when it is sprayed on them
- Someone let off a canister of pepper spray and we had to evacuate the club.有人放开了一个胡椒罐，我们不得不撤离俱乐部。
- The police used pepper spray on demonstrators.警察向示威者使用胡椒喷雾剂。