People who make fixed and oversimplified ideas about particular types of people or things.
Stereotypers can be unkind because they don't see people as individuals.
Examples:
The stereotypers think all cats are mean.
She doesn't like being around stereotypers.
The stereotypers believe all tall people are good at basketball.
The stereotypers say all bears like honey.
The stereotypers think all aliens are green and have big eyes.
The stereotypers think all pirates have a parrot on their shoulder.