Kim YoungOk	아, 길다란 선생님? 여행 선물 고마워요. Ah, Ms. Gil. Thank you for the souvenir.
Gil DaRan	별거 아닌데요, 뭐 It was nothing.
Kim YoungOk	결혼도 했는데 지적인 작업 하나 해볼래요? Now that you’re married, would you like to take on an intellectual task?

별거 아닌데요 (It was nothing / It’s not a big deal)

별거 – (별것) something unusual, special or extraordinary
아니다 – it is not
~아닌데요 – polite colloquial statement ending

Casual – 별거 아닌데 / 별거 아니야
Semi-polite – 별거 아닌데요 / 별거 아니에요
Formal – 별거 아닙니다

>> often used as a response to an expression of gratitude or compliment, similar to English expressions such as “it’s nothing”, “it’s not a big deal”, “it’s nothing special”

>> often used with the term [뭐] or [뭘], a term used as a response to a compliment or gratitude to modestly belittle one’s own deed
ex. 별거 아닌데요 뭐
ex. 별거 아닌데 뭘