high spirits
noun [ plural ] uk/ˌhaɪ ˈspɪr.ɪts/ us/ˌhaɪ ˈspɪr.əts/
兴高采烈
If someone is in high spirits, they are extremely happy and having a good time.
They'd had a couple of drinks and were in high spirits. 他们喝了几杯酒之后开始兴奋起来。
Synonym: elation