#ITZY #CHAERYEONG Birthday Wish

In the Korean comments

One comment reads, in translation, “They say that if these two did a random-play dance, it would never end,” playfully praising the pairing. Another says the song suits Chaeryeong particularly well, perhaps because it has the feel of ITZY’s “SNEAKERS.”

What the words mean

춤짱 (chum-jjang, dance ace) combines “dance” with casual slang for “the best,” so it praises someone as an outstanding dancer. In “가슴이 웅장해진다” (gaseumi ungjanghaejinda, my chest becomes magnificent), the literal bodily image works as playful internet hyperbole for a swelling sense of awe or excitement.