I kid you not

I kid you not

I'm being completely serious right now; I am not kidding. A: "What? No way!" B: "Yes, I kid you not: Brad got the lead in the school play."
See also: kid, not
Farlex Dictionary of Idioms.

I kid you not.

Inf. I am not kidding you.; I am not trying to fool you. Bill: Whose car is this? Sally: It's mine. It really is. I kid you not. "I kid you not," said Tom, glowing. "I outran the whole lot of them."
See also: kid, not
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

I kid you not

sent. I am not kidding. (Attributed to the entertainer Jack Paar.) She is a great singer. I kid you not.
See also: kid, not
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • dead-end kid
  • kid
  • handle (someone or something) with gloves
  • handle with gloves
  • give (one) a pass
  • store
  • cop
  • from the wrong side of the tracks
  • from/on the wrong side of the tracks
  • broad shoulders, have