별다줄 /byeol-da-jul/
Weird abbreviation obsession
Short for 별걸 다 줄인다 (they abbreviate everything). Used to mock or comment on the Korean habit of shortening every phrase into initials or syllables.
Examples
별다줄 ㅋㅋ 이건 또 무슨 줄임말이야
They abbreviate everything lol, what's this short for now?