ちゃらんぽらん

na-adjective, noun

irresponsible; carefree; sloppy

Describes a person or attitude that is easygoing to the point of being unreliable, heedless, or slipshod. Often carries a negative or critical tone.

• 彼かれのちゃらんぽらんな態たい度どには本ほん当とうに困こまっている。

  I'm really troubled by his irresponsible attitude.

• あの人ひとはいつもちゃらんぽらんで、約やく束そくを守まもったことがない。

  That person is always so careless and has never kept a promise.