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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."
something important or special They made a big deal about inviting the president to the reception.
Usage notes: often used to say that something represented as important is in fact only ordinary: "I ran five miles this morning." "Big deal! I ran ten." They called him a hero, but he said it was no big deal.
1. A matter of great interest or importance, as in Performing in Symphony Hall is a big deal for everyone in the chorus. [c. 1940] Also see under make a federal case out of.
2. So what? Who cares? For example, So you got the job after all-well, big deal! This use of the phrase as an ironic interjection dates from approximately the same time.
1. n. something really important. Don’t make such a big deal out of it!
2. exclam. So what!; What does it matter? (Usually Big deal!) So he snores! Big deal! Snore back!