A severely intellectually challenged person with an obnoxious greedy, anti-social personality.
Thought to derive from an abbreviation of the Lancastrian term "Mawdesley Retard" which describes mentally deficient people from the socially isolated, lifeless, snob infested grief-hole of Mawdesley in Lancashire, England.
Word derives from a punishingly bleak, socially isolated, inbred snob backwater in Lancashire, UK called Mawdesley.
Any obnoxious, anti-social, mentally disturbed, physically deformed, inbred retard. Usually from socially isolated, lifeless, joyless shitholes like Mawdesley - a tiny cunts paradise in the arse end of nowhere
I just got cut up by a fat old scowling cunt in a Range Rover. Fucking Mawtard.