1917 ‘G. B. Lancaster’ i. vi. 84 Christopher stood ramrod-rigid. He could not interpret that face.
1953 10 June 8/8 (advt.) Forget ramrod-rigid wires that jab, poke, irritate!
2003 (Nexis) 8 Nov. 1 They have made their own problems..by..showing a backbone as ramrod rigid as a jelly baby.