tipper
/ˈtɪpə(r)/noun
1
- （亦作tipper truck或lorry）a truck having a rear platform which can be raised at its front end, thus enabling a load to be discharged翻斗卡车, 自动卸货车。
2
- usu. with adj. a person who leaves a specified sort of tip as a reward for services they have received给小费（或小账）者; 给赏金者：
he's a big tipper.
他给小费时出手大方。
3
- a person who dumps waste, especially illegally随处乱倒垃圾者。