1. What does it mean?
갑분띠 shortens 갑자기 분위기 띠용. It describes a conversation or situation unexpectedly turning strange, surprising, or confusing, as though everyone has paused with a cartoonishly puzzled reaction.
Also written or said as gapbuntti
2. The nuance
It overlaps with 갑분싸 but is not identical: the focus is bewildered surprise rather than necessarily a cold or ruined atmosphere. It is an informal, comic reaction.
3. Examples
“평범한 메뉴 회의 중에 우주 얘기가 나와서 갑분띠였어.”
A normal menu discussion suddenly turned to space, leaving everyone baffled.
“친구가 엉뚱한 채팅방에 인사해서 잠깐 갑분띠가 됐어.”
My friend greeted the wrong group chat, causing a brief bewildered pause.
Sources
References support the meaning and usage. Example sentences are written for NoCapWiki.