put someone's lights out

verb

(idiomatic) To cause someone to become unconscious, especially by striking him or her.

He threatened to put his opponent's lights out.

意味（1）

(idiomatic) To cause someone to become unconscious, especially by striking him or her.

"He's taken an awful lot of punches in his last few fights and if Thomas hits him like that, he'll put his lights out. It'll be like a blackout."