There's this song, or part of it anyway, that's stuck in my head BUT I DON'T KNOW WHAT IT'S FROM

I know it's kpop, a girl group i think, maybe an intro

But I keep finding myself singing something like 'iki machaeda'

Like this

"Iki macheaeda iki- iki machaeda" and just that repeating

and I always dance to it by stepping back a few times then lifting my foot on the 'da' and then alternating

DO ANY OF YOU KNOW THIS SONG?

I'm also thinking that maybe bts danced to it since I originally thought it was a bts song and that would also explain the dance

help ;-;

Luci~<333