BTFO adjective 1verb 1 adjective1 •(Internet, vulgar) Initialism of blown the fuck out or broke the fuck off; utterly defeated or rejected. verb1 •(Internet, vulgar) Initialism of back the fuck off or butt the fuck out.BTFO! Back WAY off! This kind of ranting doesn't belong here and is only tangentially involved (if at all) with the issue at hand. — 1995
