ふざけんな

expression

stop messing around!; get real!; screw you!

Strong, colloquial imperative used to tell someone to stop joking, being unreasonable, or acting foolishly. Can be confrontational or dismissive depending on tone.

• ふざけんな！そんなこと許ゆるされると思おもってるのか？

  Stop screwing around! Do you think that's acceptable?

• ふざけんなよ、冗じょう談だんはやめてくれ。

  Get real, man. Quit joking around.