Blow one's own horn

Origin

Imagine a triumphant hunter returning to the village, or a herald announcing a dignitary's arrival—both might sound a horn to proclaim their presence or success. This vivid, literal image of someone deliberately drawing attention to themselves through a loud, self-produced sound is the root of 'blow one's own horn'. While earlier variations like 'blow one's own trumpet' have existed since the 16th century, the 'horn' version gained particular currency in 19th-century America. It paints a picture of someone so eager to share their successes that they metaphorically blast their own praises for all to hear, even if no one else has asked them to play their tune.