1. What does it mean?
개꿀 adds the rough intensifier 개- to 꿀, literally honey. Rather than describing sweetness, this slang use reacts to something that feels conveniently good: less waiting, an easy task, or an unexpected perk.
Also written or said as gaekkul
2. The nuance
It overlaps with 개이득, but can emphasize comfort or ease rather than a measurable gain. It is casual and coarse; do not treat it as neutral wording for a formal review.
3. Examples
“회의가 일찍 끝나서 산책할 시간 생겼네. 개꿀.”
The meeting finished early, so I have time for a walk. Sweet.
“짐 보관함이 역 안에 있어서 개꿀이었다.”
The lockers being inside the station was super convenient.
Sources
References support the meaning and usage. Example sentences are written for NoCapWiki.