if ever there was one(used for emphasizing that someone or something is definitely what you say they are Now there's a challenge, if ever there was one. He realized that if ever there was a time for action, this was it. MED. A heart-breaker if ever there was one; guaranteed to 'make your day'… | A modern-day Nantucket Von Trapp family if ever there was one. | ... the two children both deserve enormous quantities of credit – not least Mackenzie Foy as Murphy: an actress to watch if ever there was one. Alexander Demidov)