This is a portmanteau or blend of the words 'dunce' and 'nonce'. It means not only is the person a nonce, but they are a fucking idiot too.
by ScrimshawSudoNiM September 13, 2022
Get the Doncemug. by Donc October 15, 2019
Get the Doncmug.
Get the Doncemug.
Get the Doncmug.