big deal

nouns

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"
big cheese, big deal, big enchilada, big fish, big gun, big shot, big wheel, head honcho
anything of great importance or consequence
big deal
is a type of (narrower)
the quality of being important and worthy of note
"the importance of a well-balanced diet"
importance