An egg white separator is a kitchen tool used to separate the egg yolk from the egg white efficiently. It typically consists of a small dish or cup with slits or openings on the sides that allow the egg whites to pass through while keeping the yolk intact.
To use it, you crack an egg over the separator, and the egg whites will fall through the slits while the yolk remains on top. This tool is helpful for baking and cooking when recipes call for just egg whites or yolks.