Definitions by MUI Raimi

MUI 

Ultra Instinct (身み勝がっ手ての極ごく意い Migatte no Gokui, lit. "Key of Egoism")23 is an extremely powerful transformation that is obtained through the completion of Ultra Instinct, far surpassing the Ultra Instinct -Sign- form.

That guy just reached the MUI

MUI by MUI Raimi June 14, 2018