very rude; outrageous; extremely insolent
Strongly negative term for behavior that is shockingly rude, insolent, or morally outrageous. Often used in formal or written contexts to express severe disapproval.
I am speechless at his outrageously rude attitude.
Such an extremely insolent act is unforgivable.
Standard kanji spelling. 不届き (rudeness) + 千万 (extremely) forms a strong condemnation.
Variant spelling omitting the okurigana き. Less common but recognized.
Compound of 不届き (rudeness, impropriety) and 千万 (extremely, myriad). The suffix 千万 intensifies the preceding word, creating a strong expression of condemnation.