Someone who is at least slightly younger then you in age, but so aptly intellectual as to have the best of both worlds; brains and purely cute facial characteristics combined with childish noises that cause her companion to smile with delight.
"Hey kiddo," Chris said to Allison as she wiggled her nose, bared her pearly whites and replied with "thwawattwat"
Condescending term used by educators, especially special educators, to refer to their students. Thoroughly patronizing and obnoxious as it reduces a student to an infantile object.