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Phrase(s): You make me laugh!
Inf. Fig. What you said is totally ridiculous.; You are totally ridiculous. (Compare this with Don’t make me laugh!) • Bill: I have this plan to make electricity from garbage. Sally: What a dumb idea! You make me laugh! • Bill: I’m really sorry. Give me another chance. I’ll never do it again! Jane: You make me laugh!
McGrawhill's American Idioms And Phrasal Verbs