The obsessive compulsive practice of making the sequence, pressure, and/or intensity of sensations match on both sides of the body, rubbing toes together or making every footstep have a symmetrical amount of pressure for example. This behavior is shared by both people who suffer from OCD and autism, the term for which has been coined by u/GoatsWithWigs after reaching out to r/autism with a comic depicting symming via toe flicking. Not to be confused with stimming.
Person A: Why are you tapping your feet on the ground?
Person B: Sorry, I was just symming. One foot tapped hard on the ground, so I had to tap my other foot just as hard to make my feet feel symmetrical
Person B: Sorry, I was just symming. One foot tapped hard on the ground, so I had to tap my other foot just as hard to make my feet feel symmetrical
by Mel Goats June 23, 2022
Get the Symmingmug. 
basically when you're getting roasted by ur tings. they'll probably whip out this line at you. mainly boys use this term. but now its dead :/
by mad_tings ))(( February 8, 2022
Get the symmug. 