finger eater
Someone who spends a lot of time literally eating the ends of their fingers. Not to be confused with biting nails.
Philip is always biting his finger nails.
He's not biting his finger nails, he's eating the skin off the end of his fingers.
Philip is a dirty finger eater.
He's not biting his finger nails, he's eating the skin off the end of his fingers.
Philip is a dirty finger eater.