by a long shot

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.
Categories: adverb emphasis informal