Slang, explained by the people who actually use it.

It is an abbreviation of "suddenly pops out."

A face-filling close-up shot — a photo or video where someone's face takes up the whole frame.

"Seoul sickness" — the post-trip longing foreign visitors feel for Seoul after going home, with a strong urge to go back.

A pun on 그 자체 ("itself") swapping in japchae, the noodle dish — used to say something is the very embodiment of a quality, e.g. "cuteness itself."

Short for "scraping together even your soul" — pooling every last won, loans included, to buy a home or invest.

It is an abbreviation of "suddenly pops out."

Short for "diary decorating" — dressing up a planner or journal with stickers and washi tape; the word that spawned the whole "-꾸" (decorating) family.

Short for "lost, but fought well" — said when a team loses yet put up a great effort worth applauding.