flub
From Longman Dictionary of Contemporary Englishflubflub /flʌb/ verb (flubbed, flubbing) [transitive] American English informal MISTAKEto make a mistake or do something badly SYN fluff, mess something ↔ up Several of the actors flubbed their lines.→ See Verb tableExamples from the Corpusflub• Several cast members flubbed their lines.• You are paralyzed by the thought that you can totally flub up by missing a step.