tack tack See: GET DOWN TO BRASS TACKS, GO SIT ON A TACK, SHARP AS A TACK. No categories: add yours Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2022 To section: T Subscribe to: American IdiomsIdioms feedEnglish languageRoot page and mainstream feed Discuss