uptight as a drum

Translations
(кто-то) напряжён как барабан
He was uptight as a drum before his big presentation.
Он был напряжён как барабан перед своей важной презентацией.
Definitions
Extremely tense, nervous, or unable to relax; often used to describe someone who is very strict, anxious, or rigid in their behavior or attitude.
Words
drum

noun
барабан
uptight

adjective
напряжённый