BY A LONG SHOT

{adv. phr.}, {informal} By a big difference; by far. - Used to add emphasis. * /Bert was the best swimmer in the race, by a long shot./ Often used with a negative. * /Tom isn't the kind who would be fresh to a teacher, by a long shot./ * /Our team didn't win - not by a long shot./ Compare: MISS BY A MILE.