big time
big time {n.}, {informal}
1. A very enjoyable time at a party or other pleasurable gathering.
I certainly had a big time at the club last night.
2. The top group; the leading class; the best or most important company.
After his graduation from college, he soon made the big time in baseball.
Many young actors go to Hollywood, but few of them reach the big time.
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Source: A Dictionary of American Idioms
