Behaviour consisting of repetitive actions or movements of a type that may be displayed by people with developmental disorders, most typically autistic spectrum disorders; self-stimulation.
stimming was part of her coping mechanism
Origin
1970s: from stimulation or stimulatory + -ing.
Definition of stimming in US English:
stimming
nounˈstimiNGˈstɪmɪŋ
Behavior consisting of repetitive actions or movements of a type that may be displayed by people with developmental disorders, most typically autistic spectrum disorders; self-stimulation.