blow one’s own horn

(verb) to display one’s achievements or good characteristics to make others feel bad

Example Sentence:

A: How is your new teacher?
B: He spent the first hour of class blowing his own horn by talking about his degrees, his books, his sports car and his beautiful wife. I dislike him a lot!

The young woman blew her own horn by showing her expensive new iPhone to her jealous friends.

A: Did you get a good score on the TOEFL test?
B: I don’t want to blow my own horn, but I did fantastically!
A: Congrats!

From the Blogs:

Blowing Your Own Horn Marketing

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