Английский словарь американских идиом - big frog in a small pond

{n. phr.}, {informal} An important person in a small place or position; someone who is respected and honored in a small company, school, or city; a leader in a small group. * /As company president, he had been a big frog in a small pond, but he was not so important as a new congressman in Washington./ Contrast: LITTLE FROG IN A BIG POND.