Be out of control
= be disruptive, misbehave.
The classroom was out of control. Surprisingly, one of the students got drank when he came into the room. Though the teacher tried to shut him out, he didn't obey the teacher and started to sing in the room.
Refs
- All Clear 3, Helen Kalkstein Fragiadakis
idiom, 14-02-24 22:57, 14-02-24 22:57, Yosei