畜生(ちくしょう)beast (i.e. any animal other than man), person reborn into the animal realm, brute (i.e. a contemptible human being), son of a bitch, for Christ's sake, damn it

人間(にんげん)以外(いがい)の動物(どうぶつ)を畜生(ちくしょう)と言(い)います。

Animals other than humans are referred to as beasts. {beast (i.e. any animal other than man), person reborn into the animal realm, brute (i.e. a contemptible human being), son of a bitch, for Christ's sake, damn it}

ライバル：「ちくしょう、次(つぎ)の試合(しあい)は勝(か)つからな！」

Rival: "Damn it, I'm going to win the next match!" {beast (i.e. any animal other than man), person reborn into the animal realm, brute (i.e. a contemptible human being), son of a bitch, for Christ's sake, damn it}

独(ひと)り言(ごと)：「ちくしょう…また告白(こくはく)したのにフラれたよ…。」

Monologue: "Damn it... I confessed again but got rejected..." {beast (i.e. any animal other than man), person reborn into the animal realm, brute (i.e. a contemptible human being), son of a bitch, for Christ's sake, damn it}

人間(にんげん)以外(いがい)の動物(どうぶつ)、例(たと)えば、鳥(とり)や獣(けもの)、虫(むし)や魚(さかな)を畜生(ちくしょう)というのだとか。

Animals other than humans, for example, birds and beasts, insects and fish, are referred to as "beasts," it seems. {beast (i.e. any animal other than man), person reborn into the animal realm, brute (i.e. a contemptible human being), son of a bitch, for Christ's sake, damn it}

同僚(どうりょう)：「ちくしょう。アイツやりやがったな！俺(おれ)より営業(えいぎょう)成績(せいせき)を上(あ)げてきた！」

Colleague: "Damn it. That son of a bitch outdid me! He's made better sales than me!" {beast (i.e. any animal other than man), person reborn into the animal realm, brute (i.e. a contemptible human being), son of a bitch, for Christ's sake, damn it}