false move

See more synonyms for false move on Thesaurus.com
  1. a movement that may be interpreted as threatening.
  2. an act or action that can cause trouble or damage; mistake: If the bus driver had made one false move, we would have skidded off the icy road.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018