from Missouri, I'm

I'm from Missouri

I require proof; you'll have to show me. Often used in longer phrases, such as "Show me, I'm from Missouri," or "I'm from Missouri and you'll have to show me." The phrase derives from Missouri's nickname, "The Show Me State." I don't believe a word of what you say. I'm from Missouri—show me the deed.
See also: Missouri
Farlex Dictionary of Idioms.

from Missouri, I'm

I'm extremely skeptical so you'll have to prove it. For example, You won the lottery? Come on, I'm from Missouri. The full expression, I'm from Missouri and you'll have to show me, dates from about 1880. Some authorities believe it alludes to the Missouri Compromise of 1820, whereby Missouri was admitted to the Union as a slave state and slavery was forbidden in certain other areas, but the connection, if any, is not clear.
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • a dumb priest never got a parish
  • 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
  • be more than (something)
  • be more than glad, ready, etc.
  • away from it all
References in periodicals archive
"If I could talk to the guy from Missouri, I'm sure we'll understand.