Definition

a knockout (boxing): an instance of hitting one's opponent unconscious; a great success, a win noun
to knock (sbdy) out to give someone a blow that makes them lose consciousness
That woman is a knockout!: That woman is beautiful, gorgeous, sexy! idiom

UK: Do you think she's a real knockout?
US: Yes she is definitely a knockout.
  • "Philip : Tell me about it, she's a knockout."

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