Who is that guy? He looks like he's all puffed up?
ーWho is he? He looks like he's full of himself.
「彼は何者なんだ？偉そうに見えるけど」
full of oneself で「傲慢な・思い上がっている」
ーWho is that guy? He looks like he's all puffed up?
「あいつ誰？つけあがっているように見えるけど」
to be puffed up で「つけあがっている・思い上がっている」
ご参考まで！
カナダ 
