Dopamoron
Dopamoron doh-puh-mawr-on, noun: An individual with ADHD who revels in quirky antics to mine rushes of dopamine, much to the bewilderment and irritation of the neurotypical onlooker.
In the silence of the classrom, Johnny couldn't resist being a bit of a dopamoron, entertaining himself by lobbing tiny pieces of chopped up rubber at the back of his unsuspecting classmates' heads.