big time
US /ˈbɪɡ ˌtaɪm/
UK /ˈbɪɡ ˌtaɪm/

1.
巨大成功, 頂峰
a very important or successful level in a career or activity
:
•
She finally made it to the big time in Hollywood.
她終於在好萊塢取得了巨大成功。
•
He's hoping to hit the big time with his new invention.
他希望通過他的新發明取得巨大成功。
1.
非常, 大大地
to a great extent; very much
:
•
Thanks big time for your help!
非常感謝你的幫助!
•
He messed up big time on that project.
他那個項目搞砸了大發了。