Bastard
Guy, Fellow
noun
Ugh, that field guy. He's the worst. Always in the fields, making us look bad, quite the bastard. Really though, he's just this guy, but for some reason I sometimes don't like him.
やろう
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
あのクソ野郎がセールス・マネージャーに昇進するなんて本当に気に食わねぇ。
That bastard got promoted to sales manager. I’m sick to my stomach.