botch up . botch up {v. phr.} To ruin, spoil, or mess something up. "I botched up my chemistry exam," Tim said, with a resigned sigh. Categories: add yours {v. phr.} 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 Discuss