Katie bar the door

Katie, bar the door

A call to ready oneself for imminent danger. Katie, bar the door—trouble's coming!
See also: bar, door
Farlex Dictionary of Idioms.

Katie bar the door

Prepare immediately for an advancing threat. Katie bar the door, the grandchildren are here and they all look hungry.
See also: bar, door, Katie
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • Katie
  • Katie, bar the door
  • Katie, bar the door!
  • bar
  • alkied
  • alkied (up)
  • alkied up
  • be in (one's) cups
  • blimped
  • bewottled
References in periodicals archive
If there's a brisk northeast wind as well, Katie bar the door. This is no secret, and the dam under a big moon resembles more hand-to-hand combat than fishing.
You could almost hear it: "Katie bar the door, it's Devil-Mania!"
If the stars of "High School Musical" would help out, Katie bar the door.
"If this extraordinary legal theory is allowed to go forward, it's 'Katie bar the door' for the manufacturer or retailer of any consumer product if that product's use in a crime might be reasonably foreseen," Delfay said.