clean something out

Từ điển Oxford Advanced Learner 8th

▪ I. ˌclean sthˈout derived
to clean the inside of sth thoroughly
•I must clean the fish tank out.
Main entry: ↑clean_derived
 
▪ II. ˌclean sb/sth ˈout derived
(informal)to steal everything from a person or place
•The burglars totally cleaned her out.
Main entry: ↑clean_derived