without regard to appearances; not caring how one looks; desperately
Used when someone acts without concern for how they are perceived, often in a desperate or single-minded situation. The phrase is adverbial and typically modifies verbs of action.
He ran away desperately, not caring how he looked.
I worked desperately, with no thought for appearances, and finally paid off the debt.
見栄を張る means to be concerned with appearances or to show off, the opposite attitude of なりふり構わず.
Standard kanji-kana mixed spelling.
Full kanji spelling; less common and may be harder to read.
From なり (appearance, form) + ふり (manner, style) + 構わず (negative continuative of 構う, to care about). Literally 'without caring about one's appearance or style'.