You know that your hair is mousy if it's not necessarily a medium brown shade, not necessarily a blonde, just in the middle... with a hint of gray.
Maria: "Yea, obviously. But look at her hair... it's like a tangly light brown gray split ended... style... it ruins her face! What's the name for hair like that?"
Lina: "You're right. It's called "mousy hair". Thank GAWD my hair is not like that.."
Maria: "That's only cause you dye it"