亂搭車

Simplified: 乱搭车

luàndāchē ㄌㄨㄢˋ ㄉㄚ ㄔㄜ

    • to improperly take advantage of an activity or opportunity
    • to tag along with unrelated charges

Character by character

Saying俗语俗語

Idiom惯用语 · Rarely used now

Literally
hop on a vehicle at random
Meaning
To improperly take advantage of an activity or opportunity, such as adding unrelated charges or tagging along. Critical.

Sources