know-all

Từ điển tiếng Anh - Cambridge Advanced Learners Dictionary

know-all UK [ˈnəʊ.ɔːl] US [ˈnoʊ.ɑːl] UK ( US know-it-all ) noun countable informal disapproving
a person who thinks that they know much more than other people
Thesaurus⁺: ↑Showing arrogance and conceit ↑Confidence and self-assurance ↑Boasting ↑Unpleasant people in general ↑Unpleasant men