stimmer

noun

1. One who engages in stimming behaviour.

   “Most people probably wouldn't guess either of them had autism since they are both so high functioning; Dillon is a “stimmer” though—lots of hand flapping.”

   “Cam is a first-class stimmer. The stims have passed through stages, each more obsessive than the last.”

   “We are also perpetual stimmers: displaying or masking our stims, engaging in self-injurious or artistic stims, creatively expressing ourselves, or responding to trauma or stim suppression.”