in full swing
US /ɪn fʊl swɪŋ/
UK /ɪn fʊl swɪŋ/

1.
한창, 절정
at the peak of activity or progress; fully active or operational
:
•
The party was in full swing by the time we arrived.
우리가 도착했을 때 파티는 한창이었다.
•
Construction on the new building is now in full swing.
새 건물 공사가 이제 한창이다.