topper
/ˈtɒpə(r)/noun
1
- a machine that cuts the tops of weeds剪草机。
2
- US a hard protective lightweight cover or shell mounted on the back or bed of a pickup truck〈美〉（轻型货车的）护罩。
2.1
- US a type of camper van mounted on a truck bed〈美〉（由卡车运载的）露营车。
3
- informal a top hat〈非正式〉高顶礼帽。
4
- Brit. informal, dated an exceptionally good person or thing〈英, 非正式, 旧〉出类拔萃的人（或物）。