To praise yourself; call attention to your own skill, intelligence, or successes; boast.
Хвастаться; привлекать внимание к своим успехам, уровню и т.д.
A person who does things well does not have to toot his own horn; his abilities will be noticed by others.
Anyone will tell you she's one of the best journalists we've got, although she'd never blow her own horn.
Вам любой скажет, что она одна из лучших журналистов, что у нас есть, но она никогда не кичится этим.
People get tired of a man who is always blowing his own horn.