be as stiff as a ramrod

be as stiff as a ramrod

To have very erect posture. I've never seen Olivia slouch—she's always as stiff as a ramrod.
See also: ramrod, stiff
Farlex Dictionary of Idioms.
See also:
  • board
  • be (as) stiff as a board
  • (as) straight as a ramrod
  • ramrod straight
  • bore stiff
  • stiff
  • bored stiff
  • bore (one) stiff
  • on one's
  • on someone's