Vocabulary
눈치가 빠르다
be quick to pick up cues
Meaning
Expression 눈치가 빠르다: be quick to pick up unspoken clues.
Why this form?
눈치채다 — notice, realize: a particular moment of noticing; 눈치가 빠르다 describes an ability.
Forms not to confuse
눈치채다
그가 거짓말한다는 걸 눈치챘어요. — I realized he was lying.
Examples
이 사람, 눈치가 빠르다. — This person picks things up quickly.
그는 눈치가 정말 빨라요. — He is very quick to read the room.