stimmy /ˈstɪ.mi/adjective 1noun 1forms 3 adjective1 •(informal) Engaging in, characteristic of, or related to stimming.She was a lot less "stimmy" and spaced out. — 2000 noun1 •(slang) Stimulus (funds usually provided by a government in times of economic hardship).Quiet references are made to “stimmy” money, for example, and the show trusts us to understand that this is the family’s term of endearment for federal stimulus funds the Bluth company received. — 2013 formsstimmies · more stimmy · most stimmy