if I'm lying, I'm dying

if I'm lying, I'm dying

slang I am absolutely telling the truth. Often stylized as "if I'm lyin', I'm dyin'." A: "And you swear that you'll pay me back by the end of the week?" B: "Of course, bro—if I'm lyin', I'm dyin'! A: "You're bluffing. There's no way you have proof that I did anything wrong." B: "Try me. If I'm lying, I'm dying."
See also: dying, if
Farlex Dictionary of Idioms.
See also:
  • be more than (something)
  • be more than glad, ready, etc.
  • be at a disadvantage
  • at a disadvantage
  • address (one's) comments to (someone or something)
  • address comments or remarks to
  • address (one's) remarks to (someone or something)
  • be in it for
  • away from it all
  • be out of (one's) head