Korean Slang
썸
sseom
What it means
The flirty stage before officially dating.
Where it comes from
From English “something” — as in “there's something between them.”
When you'd use it
Asking a friend about a crush.
Example
너 요즘 그 사람이랑 썸 타지?You've got a thing going with that person, right?
Careful
Casual — fine with friends, out of place in formal writing or with your boss.