big-time
big-time {adj.}
Belonging to the top group; of the leading class; important.
Jean won a talent contest in her home town, and only a year later she began dancing on big-time television.
Bob practices boxing in the gym every day; he wants to become a big time boxer.
- Often used in the phrase "big-time operator".
Just because Bill has a new football uniform he thinks he is a big-time operator.
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Source: A Dictionary of American Idioms
