Blow your own trumpet
Meaning
Boast about oneself.
Usage
Warns against bragging too loudly.
Origin & History
Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.
Trumpeters once announced victories and triumphs.
Common in British English since the 19th century.