live off something

Từ điển Oxford Advanced Learner 8th

▪ I. ˈlive off sth derived
to have one particular type of food as the main thing you eat in order to live
•He seems to live off junk food.
Main entry: ↑live_derived
 
▪ II. ˈlive off sb/sth derived
(often disapproving)to receive the money you need to live from sb/sth because you do not have any yourself
•She's still living off her parents.
•to live off welfare
Main entry: ↑live_derived