toot one's own horn

• blow one's own horn

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toot one's own horn (third-person singular simple present toots one's own horn, present participle tooting one's own horn, simple past and past participle tooted one's own horn)

1. (idiomatic) To promote oneself; to boast or brag; to tout oneself.

   Not to toot my own horn, but I already knew all that.

   Synonym: blow one's own trumpet