시시콜콜해요 · 시시콜콜했어요 · 시시콜콜한 (+noun)
trivial, petty; overly detailed
Example
그는 시시콜콜한 일까지 다 간섭해요.
He meddles in even the most trivial things.
Word parts
Probably built on 시시하다 'petty, dull', doubled up for rhythm.
Good to know
The adverb is common too: 시시콜콜 따지다/묻다 'to nitpick, ask about every little thing'.
Related words