I really like listening to loud edm music in a parked car to feel the vibrations against my body and vibe or body bounce. Like really bouncy and bassy and edm is perf for movement stims for me. I also did music stuff so like tapping my hands/fingers to beats, foot tapping wasn't reprimanded because my dad was a music person (and suspected asd too, but he barely acknowledges he has anxiety now).
I had one that I stopped doing by preteen age because it was admonished. I can not describe it well though. I also have oral stim fixation (its why im a smoker), thumb sucker in utero and for most of my childhood but not publicly after a time, chewer of non food items (but not eat, except for sand as a small kid because i like the texture). I wanna find a chew toy thats....adult like and not a childs
My negative stim is also an ocd body focused repetitive something. I have spent multi-hours to multi-days manually manipulating all the knuckle joints in my hand to the point I've partially dislocated one before kn my bad bad joint, and they no longer make the traditional pops/cracks of the knuckles after some time and are super swollen. I literally cannot stop unless I sedate myself with benadryl or my vistaril when I had an active script (it was to help for my fake itchiness due to skin numbness and feeling...creepy crawlie/bugs...turns out its used for ocd so it helped for the knuckle issue). I also like to pick at things (started out as the seams on my blankets as a toddler and kid and the like) and consider it a negative stim when it's my skin because my ocd forces me to pick (my nails or small pointy objects) at acne, blemishes on body, leg hair follicles, scabs especially itchy scabs(but im mindful if it's like say my back surgery wounds I was really good about not picking at them while healing because I knew what a big infection could do to the overall health of my spine and had my mother to keep an eye out on that).