What is the meaning of Cootie?

A louse (Pediculus humanus).

Any germ or contaminant, real or imagined, especially from the opposite gender (for pre-pubescent children).

A nest-building female American coot (counterpart to cooter).

A sideswiper, a type of telegraph key.

A wooden dish or tub for kitchen use.

Having feathers on the legs.

Source: wiktionary.org