1. overactive - Adjective
2. overactive - Adjective Satellite
more active than normal
Source: WordNetLilly says I have an overactive imagination and a pathological need to invent drama in my life. Meg Cabot
My mother's psychologist says I have an overactive anger switch, but people just keep pissing me off. Meg Cabot
I've always had a slightly overactive imagination. Daniel Radcliffe
However my parents - both of whom came from impoverished backgrounds and neither of whom had been to college, took the view that my overactive imagination was an amusing quirk that would never pay a mortgage or secure a pension. J. K. Rowling
I have an overactive brain, and as a result of that, I can really get in my own mind. So I like to try and exercise it to the point of exhaustion. Jake Gyllenhaal
a hyperactive child Source: Internet