punch (one's) lights out
To render one unconscious with a punch. A: "Oh man, what happened?" B: "Well, you and Bart were fighting, and then Bart punched your lights out." Wow, you're strong—you could punch someone's lights out no problem!
punch someone's lights out
Sl. to knock someone out with a fist. You had better stop that, or I will punch your lights out! Do you want me to punch your lights out?
punch someone's lights out
beat someone up.punch someone’s lights out
tv. to knock someone out; to close someone’s eyes with a hard blow. Shut up, or I’ll punch your lights out.