Don’t go getting all het up about this.
Or in a dither, jittery or jumpy.
Forget getting antsy or aflutter.
Rarin’ or wild is out of the question.
Having butterflies or the heebie-jeebies doesn’t become you.
Don’t make a fuss or get frazzled.
:dubious: Okay, the movie’s not so old but the phrase definitely is; Google Ngrams, again, records the use of “[someone’s] blood was up” as early as 1800.
Never Mind. Kimstu got to it first.
I’ve no doubt it’s an old phrase, essentially synonymous with adrenaline rush. I was just leery about using Hollywood as a cite for mid-1800s vernacular. 