improvisation

Idioms (4)

• play it by ear Informal · CEFR B2
  To deal with a situation as it develops rather than following a fixed plan.
• on the fly Neutral · CEFR B2
  while something is happening, without prior preparation
• by the seat of your pants Informal · CEFR C1
  to do something by instinct and improvisation rather than by plan
• off the cuff Informal · CEFR B2
  said without preparation