やがるverb suffix indicating hatred and contempt, or disdain for another's action

くそ！あいつ俺(おれ)に嘘(うそ)をつきやがった！

Damn! That jerk lied to me!

競馬(けいば)の客(きゃく)：「くそ！あの馬(うま)、また負(ま)けやがった！」

Horse Racing Spectator: 'Damn it! That horse lost again!'

看守(かんしゅ)：「おい、そこの囚人(しゅうじん)、勝手(かって)にどこへ行(い)きやがる！」

Guard: 'Hey, you! Prisoner! Where the heck do you think you're going without permission?!'

兄(あに)：「あいつ妹(いもうと)とキスしてやがる！痛(いた)い目(め)に遭(あ)わさずにはおかないぞ！」

Brother: 'That bozo is kissing my sister! He's not getting away with this!'

真面目(まじめ)で従順(じゅうじゅん)なあの社員(しゃいん)に引(ひ)き換(か)え、この社員(しゃいん)はふざけた事(こと)を言(い)いやがる…。

Compared to that serious and obedient employee, this one has the nerve to spout nonsense...