頓とん狂きょう

na-adjective, noun

wild; freakish; crazy; hysterical

Describes behavior, speech, or a person that is wildly eccentric, absurd, or hysterically out of control. Often used in the phrase 素っ頓狂 (そっとんきょう) for an even stronger effect.

See also: 素っ頓狂

• 彼かれは突とつ然ぜん頓とん狂きょうな声こえを上あげて笑わらい出だした。

  He suddenly let out a wild laugh.

• その頓とん狂きょうなアイデアにみんな呆あきれた。

  Everyone was taken aback by that crazy idea.