Who is the mud girl who says eeeeuuuuu... That is the best commercial ever?

The "mud girl" you're referring to is likely a character from an iconic commercial for the 2020 Super Bowl, which featured a humorous take on the struggles of outdoor activities. The phrase "eeeeuuuuu" became memorable because of the exaggerated reaction to being covered in mud. This character, played by actress and comedian Tessa Thompson, resonated with audiences for her relatable and comedic expression. The commercial gained popularity for its fun and lighthearted approach.