noun

• (informal, uncountable) Sensory 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. […]”"
• (psychology, autism) Any repetitive self-stimulatory behavior (e.g. hand flapping, head banging, repeating noises or words), frequent in autistic people.
  "Autistic people often stim with the help of technologies such as music and stim toys or tools to mediate between inner worlds and outer environments that may over/underwhelm us."
• (pharmacology, obstetrics, countable) Any drug that stimulates a woman's ovaries to produce eggs.

verb

• (psychology, intransitive) To perform such a repetitive self-stimulatory action.
  "Autistic people often stim with the help of technologies such as music and stim toys or tools to mediate between inner worlds and outer environments that may over/underwhelm us."

noun

• (slang) Synonym of stimulant (“drug”).

noun

• (rare, Ireland, chiefly in the negative) A whit or jot; the least amount.
  "That boy hasn't a stim of common sense."