Definition of "big deal" in English

Noun

1. Something very important or difficult; a matter of great concern; a considerable feat or achievement.

   • It's a big deal to him to get this promotion.
   • It's no big deal if you don't finish it today.
   • Why do you always have to make such a big deal of tiny punctuation errors?

2. Someone very important; a VIP.

   • She's a big deal in music in Spain.

Interjection

1. Indicates that something is not important or impressive; so what.

   • He can run a mile in six minutes? Big deal! Some people can do it in four.
   • So you beat the worst team in the league. Big deal, call the TV crews.