Verb
sweat bullets (third-person singular simple present sweats bullets, present participle sweating bullets, simple past and past participle sweated bullets)
(intransitive, slang, idiomatic) To sweat profusely; especially, to be very nervous or anxious.
He was sweating bullets about the exam all week.
I still sweat bullets if I go on The Tonight Show, but I tell myself, You can either have fun tonight or you can be shy and miserable. You ask my friends or anyone I work with now - nobody would say I was shy. Lara Flynn Boyle