ふざけんなstop bullshitting me, you're fucking kidding me, you're full of shit

兄(あに)：「よくも妹(いもうと)に手(て)を出(だ)したな！ふざけんな！」

Brother: 'How dare you lay a hand on my sister! Are you fucking kidding me!'

厳格(げんかく)な父親(ちちおや)：「大学(だいがく)を中退(ちゅうたい)したいだと？ふざけんな！」

Strict father: 'You want to drop out of college? Get real!'

ヤクザ：「お前(まえ)今(いま)肩(かた)をぶつけてきただろ！ふざけんな！殺(ころ)すぞ！」

Yakuza: 'You just bumped into me, didn't you?! Don't mess with me! I'll kill you!'

彼氏(かれし)：「お前(まえ)、また浮気(うわき)をしたのか？ふざけんな！もう終(お)わりだ！」

Boyfriend: 'You cheated on me again, didn't you? Stop bullshitting me! We're done!'

国民(こくみん)の声(こえ)に耳(みみ)を貸(か)す気(き)のない政治家(せいじか)に対(たし)して「ふざけんな！」と怒(いか)りが込(こ)み上(あ)げる。

I get furious at politicians who have no intention of listening to the people, and it just makes me want to scream 'Screw you!'