get tongue-tied 说不出来，竟然激动得张口结舌
ants in one's pants不耐烦，很着急
e.g. have ants in one's pants about something对某事不耐烦
heebie-jeebies 紧张的感觉
e.g. give someone heebie-jeebies使某人很紧张
get worked up 变得很激动，很愤慨
e.g. I'm all/a little worked up about it.我真得很激动。
don't get worked up.