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. All of the students were as stiff as ramrods during the principal's lecture. He was as stiff as a ramrod after his name was called, too nervous to move.

See also: ramrod, stiff

See also:

board
ramrod
(as) stiff as a ramrod
stiff with (something)
be (as) stiff as a board
sit bolt upright
ramrod straight
(as) straight as a ramrod
(as) stiff as a board
stiff as a board

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