DY: (talking about how he realised umpah umpah was about swimming after he went swimming)
JH: (explaining that the sound is made when beginners learn swimming; head in "um", head out "pah")
JN: AH! really?!
DY: yes! pic.twitter.com/yL1qyZln0l

— 맑구리 (@markcublee) October 12, 2019