flatter oneself flatter oneself To be sure of your own talent or skill; highly confident. I flatter myself that I am a better swimmer than he is. No categories: add yours Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2025 To section: F Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Discuss