Misunderestimation

Origin

misunderestimate + -ion

Full definition of misunderestimation

Noun

1. (nonstandard) An inaccurate underestimation, or an act of misunderestimating.
• We find even in our own agency very significant misunderestimations of the effectiveness.
• This is not the first time our president has worried about misunderestimation, so it’s fair to regard this not as a slip of the tongue, but as something the president of the United States thinks is a word.

Usage notes

As with the root misunderestimate, this is usually but not always employed in jocular reference to former US President George W. Bush.