mattoid

/ ˈmætɔɪd /

noun

1. rare.
   a person displaying eccentric behaviour and mental characteristics that approach the psychotic

Word History and Origins

Origin of mattoid¹

C19: from Italian, from matto insane

Example Sentences

I thought at first you were a mattoid, but you're so amazingly consistent.

From Project Gutenberg

These mattoid scientists make a direct and disastrous attack upon the latent self-respect of criminals.

From Project Gutenberg