a big deal

big deal

1. Something that is considered important or consequential. Being the first in her family to graduate college was a big deal to Katie. I'm kind of a big deal here, but I'll just be the new kid when I switch schools.
2. Who cares? That's not impressive or important. So you did 20 push-ups. Big deal, I can do 100. A: "Wow, a 1969 Mustang!" B: "Big deal. It's just a car."
See also: big, deal

a big deal

a thing considered important. informal
See also: big, deal
References in classic literature ?
I worked a big deal in futures for their father this morning; nice girls; it's time they were getting married.
It was a big deal in 1963, and it would be a big deal now,'' McConahay said.
Angels manager Mike Scioscia didn't think the scuffle between Barry Bonds and Jeff Kent of the Giants was such a big deal.