mistweet noun 1verb 1forms 3 noun1 •A tweet (message sent on X or (formerly) Twitter) that should not have been sent, such as one that is inappropriate, embarrassing, sent in error, etc.The job offer was withdrawn and 'Cisco Fatty' became a legendary mistweet and a cautionary tale for all those who blurt out such thoughts without setting their account to private. — 2012 verb1 •To send a mistweet.Even if you press Delete seconds after you've mistweeted, someone somewhere may have taken a screen shot. — 2013 formsmistweeted · mistweeting · mistweets