Question

to blow your own horn - What I really dislike about her is how she's always blowing her own horn.  - He shouldn't go around blowing his own horn like that. He'll only make himself unpopular.  - He wasn’t the kind of person who blew his own horn much but he was justifiably proud of his writings.  - Remember, you can nominate libraries other than your own -- so if you don't feel ready to blow your own horn, put in a good word for your favorite colleague.

Accepted Answer

to boast; to say how good you are The horn in question here is the musical instrument. An alternative is to blow your own trumpet.

Idiom	to blow your own horn
Definition	to boast; to say how good you are
Examples	- What I really dislike about her is how she's always blowing her own horn. - He shouldn't go around blowing his own horn like that. He'll only make himself unpopular. - He wasn’t the kind of person who blew his own horn much but he was justifiably proud of his writings. - Remember, you can nominate libraries other than your own -- so if you don't feel ready to blow your own horn, put in a good word for your favorite colleague.
Note	The horn in question here is the musical instrument. An alternative is to blow your own trumpet.

Horn Blow Good Blowing Boast I Dislike She's