Egregious a. : Surpassing; extraordinary; distinguished (in a bad sense); -- formerly used with words importing a good quality, but now joined with words having a bad sense; as, an egregious rascal; an egregious ass; an egregious mistake.

Example:
Has the radical left made an Egregious error in getting their?

Taxonomy
Merriam-Webster Online Dictionary, egre, gious, Dictionary, webster, Word Games, Webster Online Dictionary with audio pronunciations, thesaurus, glossary, english, language, ESL, adjective, Etymology, Latin, greg, grex, herd.

Defination from the web:
egregious from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... 2 : conspicuous; especially : conspicuously bad : flagrant <egregious errors> — egre·gious·ly adverb. — egre·gious·ness noun. Learn more about "egregious" ...