punch lights out

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!
See also: lights, out, punch
Farlex Dictionary of Idioms.

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?
See also: lights, out, punch
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • punch (one's) lights out
  • punch someone’s lights out
  • punch someone's lights out
  • put (one's) lights out
  • eat my shorts
  • Eat my shorts!
  • packaged
  • put under
  • put (one) under
  • render up