Born In A Barn Meaning

(idiomatic) Engaging in the annoying behavior of inappropriately, and usually neglectfully, leaving open a door or window.

Example: 1971, Joyce Carol Oates, Wonderland: A Novel, Vanguard Press, p. 76:
  His aunt said angrily: "Fritz, were you born in a barn? Don't you have any manners?"
2002 June 19, Ruth Ann Baker, "Even wolves behave in the pack," Pittsburgh Post-Gazette, p. N4 (retrieved 15 Sep 2008):
  Phone at a symphony concert? I'd ask if these people were born in a barn, but that would disrespect the animals.
Of humble birth, especially when referring to Jesus Christ.
2007 July 6, "A Catholic vision for farm and town," National Catholic Reporter (retrieved 15 Sep 2008):
  No surprise really for followers of Jesus, who after all was a rural dweller himself, born in a barn.
2006 Oct. 20, Heather Murphy, "The More the Merrier?," Washington Post (retrieved 15 Sep 2008):
  Neither bothered to lock or shut the house's front or back doors. "It was like they had been born in a barn," she says.