1. What does it mean?
꾸러기룩 is a fashion label for casual styling with a cheeky, youthful feel. Loose tops, caps, overalls, or bright details might create the impression, but the word names an overall mood rather than a fixed checklist of garments.
Also written or said as kkureogiruk
2. The nuance
The 꾸러기 part evokes a mischievous kid. Adults can wear the style; describing an outfit this way does not mean the wearer is immature or badly behaved.
3. Examples
“모자에 멜빵바지를 더하니까 꾸러기룩 느낌이 났어.”
Adding a cap to the overalls gave the outfit a playful, mischievous feel.
“같은 운동화도 어떻게 입느냐에 따라 꾸러기룩이 돼.”
The same sneakers can create a playful casual look depending on the rest of the outfit.
Sources
References support the meaning and usage. Example sentences are written for NoCapWiki.