Another word for stupid, object of calling someone this is to make them feel less than the person who's calling them "Stupad" Or "Stupid". Miss spelt on purpose making calling someone "Stupad"/"Stupid" Ironic.
The amalgamation of stupidity and arrogance. Where bad decisions aren't quite narcissistic, and yet inflated self worth and compromised decision making--sometimes the former affecting the latter--come together to result in blunders of near historic proportions
Ivanka Trump using a personal email account as a Senior Aid to a President, her father, who feels that his opponent should be locked up for previously acting in kind, demonstrated stuparrogance of epic proportions on Ms. Trump's part.