'I know'의 줄임말로, 상대방의 말에 동의하거나 이미 알고 있음을 나타내는 인터넷 속어.
An abbreviation for 'I know', used in text messaging and social media to indicate agreement or that one is already aware of something.
예문:
"IK, it's so frustrating when the bus is late."
"IK right? That was the best concert ever."