straphanger
/ˈstræˌhæŋə(r)/noun
1- informal a standing passenger in a bus or train〈非正式〉（公共汽车或火车上）站立的乘客。
1.1
- chiefly US a person who commutes to work by public transport〈主美〉乘公共交通上下班的人。
派生词