that one kid

A general description for a child that is considered completely different compared to children in other social groups, particularly in grade school or high school. "That one kid" typically involves someone that shows one or more of the following traits:

1. Has no social standing with any social groups (in other words, an outcast) stemming from issues with socialization either from having a disorder (autistic spectrum disorder, speech disorders, etc.) or from a lack of social skills being taught to them in a young age.

2. Causes trouble around class, usually via acting up as well as disobeying teachers and rules.

3. Exhibits behaviors that other social groups find unacceptable or strange (having unusual hobbies, mannerisms, etc.).

1. No one wanted to hang out with "that one kid" because she acted like she was a literal chicken by making weird clucking noises, wearing feathers a lot of times, and trying to peck people.

2. Teachers didn't like that one kid because whenever they tried to teach, he always made wisecracks and misbehaved.