big time       
 adverb  informal uk/ˈbɪɡ ˌtaɪm/ us/ˈbɪɡ ˌtaɪm/
 很大程度上,非常
If you do something big time, you do it to a great degree.
  "How was the interview?" "Terrible, I messed up big time." “面试怎么样?”“糟透了,我完全弄砸了。” 
 Chrissy's into skiing big time (= likes skiing a lot). 克丽茜很喜欢滑雪。 
 big time          
noun  informal uk/ˈbɪɡ ˌtaɪm/ us/ˈbɪɡ ˌtaɪm/
the big time 出名,成功
the state of being famous or successful
  She finally hit the big time (= became famous or successful) with her latest novel. 她最终因新出版的小说而一举成名。 
 You've really made the big time now (= become famous or successful). 你现在真是功成名就了。 
 big-time
adjective usuk/ˈbɪɡ.taɪm/
 一流的;极为成功的
highest or most successful
  Steve Largent was regarded as Seattle's first big-time football star. 史蒂夫‧拉根特被视为西雅图首位取得巨大成功的橄榄球明星。