(as) straight as a ramrod
US /əz ˈstreɪt əz ə ˈræm.rɑːd/
UK /əz ˈstreɪt əz ə ˈræm.rɑːd/

1.
곧게 펴진, 매우 곧은
very straight, especially with reference to a person's posture
:
•
He stood as straight as a ramrod, looking at the general.
그는 장군을 보며 곧게 서 있었다.
•
Her back was as straight as a ramrod, even after hours of sitting.
몇 시간 앉아 있은 후에도 그녀의 등은 곧게 펴져 있었다.