stim

Etymology 1

Clipping of stimulation.

noun

1. (informal) Clipping of stimulation.
   “Electric therapy has been used in medicine for thousands of years,” says Ken Rusche, director of Wellington Sports Medicine and Rehabilitation Center, a physical therapist and athletic trainer. “[…] Electrical stim is being used in the field of medicine for rehabilitation and strengthening after injuries. […]” 1986 January, Joan Fox, “Can You Get Tanned and Trim Without Sun or Exercise?”, in Cincinnati, volume 19, number 4, →ISSN, page 102
2. (psychology) Any repetitive self-stimulatory physical movement or other behavior (e.g. hand flapping, head banging, repeating noises or words), frequent in people on the autism spectrum, mostly done subconsciously as a protective response to overstimulation.

verb

1. (psychology) To perform such a repetitive self-stimulatory action.

Etymology 2

Clipping of stimulant.

noun

1. (slang) Clipping of stimulant (drug).