big fish

Noun big fish has 1 sense

• big fish(n = noun.person) big cheese, big deal, big enchilada, big gun, big shot, big wheel, head honcho - an important influential person; "he thinks he's a big shot"; "she's a big deal in local politics"; "the Qaeda commander is a very big fish"
is a kind of important person, influential person, personage
has particulars: knocker, supremo