Heart Pounding bum bum bum #IVE

In the Korean comments

One comment says, in translation, “Liz’s outfit has exactly the feel of a singer from the old days,” giving viewers a specific styling detail to watch for. Other comments affectionately call Liz 치즈냥 (chijeunyang, “cheese kitty”) and 어른 리즈냥 (eoreun rijeunyang, “grown-up Liz kitty”); 냥 (nyang, “meow/kitty”) turns her name or appearance into a playful cat nickname.

What the words mean

심장소린 (simjang sorin, “the sound of the heart is”) is a compressed, lyrical form of 심장 소리는 (simjang sorineun, “as for the sound of the heart”). It makes “bum bum bum” the heartbeat itself—essentially, “the heart goes bum bum bum”—in a casual, songlike register.