To boast or brag about one's own abilities or achievements.
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To praise yourself and talk up what you have done.
When you blow your own horn, you make sure people know about your wins.
Others may find it too much.
"Show Off"
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Displaying a skill or possession specifically to impress others
"Pat Yourself on the Back"
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Giving yourself private or quiet credit for something you did well
"Blow / Toot Your Own Horn"
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Actively and publicly praising your own accomplishments to others