One who's not all there?

Usage examples of halfwit.

It is a terrible thing to feel oneself useless and at the same time on every side to see halfwits and profascists filling important jobs.

Halfwits in both East and West, Halfwits like Marshal Paponovich and General Nitz.

The Goddamned Parrot could do as well as the crooks and incompetents and senile halfwits running things now.

And all the time this was going on, while a large wild man with dreadlocks was trying to wrench open my door with a view to carrying me off wriggling into the darkness, some halfwit from the foreign desk fifty yards ahead was walking slowly around his Peugeot, assessing it deliberatively like someone about to buy a second-hand car, and occasionally pausing to look with puzzlement at the bricks and blows raining down on the cars behind him, as if it were some kind of freak weather occurrence.

With the cows and the milking machine installed, Joe hired a halfwit from Motion to take care of his investment.

Imagine sharing this space with 1,600 other similarly dashing craft, most of them in the control of some pot-bellied urban halfwit with next to no experience of powered craft, plus all the floating jetsam of rowboats, kayaks, pedalos and the like and it is a wonder that there aren't bodies all over the water.