pick on somebody

Từ điển Oxford Advanced Learner 8th

ˈpick on sb/sth derived
1. to treat sb unfairly, by blaming, criticizing or punishing them
•She was picked on by the other girls because of her size.
2. to choose sb/sth
•He picked on two of her statements which he said were untrue.
Main entry: ↑pick_derived