to consider everyone else beneath one (idiom); so arrogant that no-one else matters
condescending
to go about with one's nose in the air
Definitions (粵典–words.hk)
語句
非常自大,完全唔尊重其他人 to be supercilious; to be arrogant; literally: no one in sight
佢雖然係經理,但係重大嘅決定應該同大老闆商量吓,唔可以目中無人,自己話晒事嘅。
佢虽然系经理,但系重大嘅决定应该同大老板商量吓,唔可以目中无人,自己话晒事嘅。
keoi5 seoi1 jin4 hai6 ging1 lei5, daan6 hai6 zung6 daai6 ge3 kyut3 ding6 jing1 goi1 tung4 daai6 lou5 baan2 soeng1 loeng5 haa5, m4 ho2 ji5 muk6 zung1 mou4 jan4, zi6 gei2 waa6 saai3 si6 ge2. Although he is a manager, he should discuss important decisions with the boss. He can't be so arrogant and make all the decisions by himself.
Definitions (Wiktionary)
phrase, idiomatic
to be prideful; to be haughty; to be arrogant