backhander
/ˈbækˌhændə(r)/noun
1
- a blow made with the back of the hand反手一击：
shut up, or I'll give you a backhander.
闭嘴, 否则我反手抽你一记。
1.1
- a backhand stroke or shot in a game反手击球。
2
- Brit. informal a secret payment, typically one made illegally; a bribe〈英, 非正式〉（尤指非法支付的）秘密款项; 贿赂：
a fortune had been paid in backhanders to local officials and politicians.
一大笔贿赂给了当地官员和政客。