humblebrag /ˈhʌmbl̩ˌbɹæɡ/noun 1verb 1forms 3 noun1 •(informal, slang) An ostensibly self-deprecating statement made to show off.I am as guilty as the next wannabe Overachieving Mom when it comes to the humblebrag Christmas letter. I can’t help it. It’s in my genes. — 2015 verb1 •(informal, slang) To make such a statement.The Four Seasons even humblebragged about its failure to accommodate Buffett’s special request on its Facebook page. — 2019 formshumblebragged · humblebragging · humblebrags