''Full of yourself'' in American English

Xavier da Silva

Senior Member
Hello everyone,

Does "full of yourself" (= considering yourself too important, better than other people) sound idiomatic in my examples below in American English?

a. You should be less full of yourself. I can't stand people like that. It is getting on my nerves.
b. Don't be so full of yourself. Just because you won, it doesn't mean you are better than us.

Thank you in advance!
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