Taken from the word Moron with an extra 'o' at the end, followed and conjoined by the suffix of '-tard' from the word Retard.
The act of being a Moron AND a Retard. Created by P-Ro and Chewie in Sierra Vista, Az
Chewie to his wife: "The word was 'HOTEL' you dumb broad!"
P-Ro to Chewie: Bro, you're such a Moronotard