rark up v. phr. to disturb, annoy, or provoke (someone), especially verbally; to chastise or harangue; to stimulate, motivate, or excite (someone). Occasionally non-phrasal: rark. Also as noun, rark-up or rark, a chastisement, goading, or...
stim v. to self-stimulate; (specifically) among autistic people, to fixate on a comforting or compelling thing or action (such as rocking or humming); to perseverate. Also n., a (self-)stimulating thing or behavior. (source: Double-Tongued...