The slightly frowning face emoji depicts mild disappointment or dissatisfaction.
Unicode: U+1F641
The slightly frowning face emoji conveys a subtle expression of displeasure, mild frustration, or slight sadness. It is often used to express a mild negative reaction or a sense of being underwhelmed or unimpressed by something.
"I studied really hard, but I only got a ð on the exam."
"The new movie was just ð, not as good as I expected."
"I'm feeling a bit ð today, but I'll get over it."