でたらめ

(1)dependent upon or characterized by chance; "a haphazard plan of action"; "his judgment is rather hit-or-miss"

(2)偶然によって特徴づけられるまたはそれに頼る

(3)showing lack of care for consequences; "behaved like an irresponsible idiot"; "hasty and irresponsible action"

(4)結果に対する注意の欠如を示す

(1)behaved like an irresponsible idiot

(2)無責任なばかのように振舞った

(3)hasty and irresponsible action

(4)急で無責任な行動