1. What does it mean?
민초 abbreviates 민트 초코. It can name the flavor itself, such as mint-chocolate ice cream, while 민초단 or 민초파 refers to people who like it.
Also written or said as 민트초코, mincho
2. The nuance
In historical or political writing, the separate word 민초 can mean ordinary people. Food context makes the abbreviation clear; liking or disliking the flavor is just a preference.
3. Examples
“민초 아이스크림이 있길래 작은 컵으로 골랐어.”
They had mint-chocolate ice cream, so I chose a small cup.
“나는 민초도 좋아하고 바닐라도 좋아해.”
I like both mint chocolate and vanilla.
Sources
References support the meaning and usage. Example sentences are written for NoCapWiki.