Jason is a smart guy with a great vocabulary, but, if I'm not mistaken, he's misused this word on HDTGM multiple times.
nonplus
[non-pluhs, non-pluhs]
verb (used with object), non路plussed or non路plused, non路plus路sing or non路plus路ing.
to render utterly perplexed; puzzle completely.
noun
a state of utter perplexity.