日本語のニュアンスが分からないくせに、自分の辞書のほうが正しいと言い張る傲慢な毛唐だ。

tbd

You're an arrogant dirty foreigner who claims your dictionary is correct even though you don't understand the nuances of Japanese.

手を付けずダラダラしているくせに、「うへー、今度こそ間に合わないかも！？」と心はビクビクしている。

tbd

Despite having lazed around without having touched my work I'm frightened at heart that "Ooh-er, this time I might really not get done in time!?"

自分でもわかってるくせに。

tbd

彼は太っているくせに声は細い。

tbd

His voice is thin even though he is fat.

彼は金持ちのくせに乞食のような生活をしている。

tbd

He's rich, but he lives like a beggar.

He is rich yet he lives like a beggar.

彼って意地悪だと思わない？私がホラー物の映画が嫌いなのを知ってるくせにいつも見るんだよ。もう、いやんなっちゃう。

tbd

Isn't my boyfriend terrible? He always takes me to see horror movies, even though he knows I don't like them. I hate it.

青二才のくせに何を言うか。

tbd

That's big talk for an upstart like you.

新米のくせに大きな顔をするな。

tbd

Act your place.

最近は、年下のくせにため口を聞く奴が多すぎる。

tbd

These days more and more young people talk to their elders on even terms.

警官のくせに泥棒を怖がるなんて。

tbd

Even though he's a policeman, he's afraid of thieves.