also big-time
1.
You can use ~ to refer to the highest level of an activity or sport where you can achieve the greatest amount of success or importance. If you describe a person as ~, you mean they are successful and important. (INFORMAL)
He took a long time to settle in to big-time football.
...a big-time investment banker.
ADJ: usu ADJ n
2.
If someone hits the ~, they become famous or successful in a particular area of activity. (INFORMAL)
He hit the ~ with films such as Ghost and Dirty Dancing.
N-SING: the N
3.
You can use ~ if you want to emphasize the importance or extent of something that has happened. (AM INFORMAL)
They screwed things up ~...
America lost big-time.
ADV: ADV after v emphasis