A yellow face with simple, open eyes and a slight frown. Often conveys a mild degree of concern, disappointment, or sadness, but usually less intensely than ☹️ Frowning Face.
Samsung and Facebook previously included eyebrows.
📅 Slightly Frowning Face was approved as part of Unicode 7.0 in 2014
and added to Emoji 1.0 in 2015.