by the seat of one's pants . by the seat of one's pants See: FLY BY THE SEAT OF ONE'S PANTS. No categories: add yours Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: B Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Leave my opinion