Rat emoji meaning

The rat emoji is a picture of a small, long-tailed rodent with pointed ears and a pointed nose. It is often depicted in a gray or brown color, and may be shown with a mischievous or cunning expression on its face. In emoji form, it is often used to represent vermin or pests, or to make a reference to the saying "to rat someone out," meaning to betray or inform on someone. It can also be used more generally to represent small animals, sneaky or deceitful behavior, or uncleanliness.

The rat emoji was approved in Unicode 6.0 and added in Emoji 1.0, see related proposal L2/09114