ADJ
(用于名词前)特别好的，异常巨大的，非常重要的
Young people sometimes use mega in front of nouns in order to emphasize that the thing they are talking about is very good, very large, or very impressive.
例句
...her newly acquired mega salary.
她刚刚到手的巨额薪水
...the mega superstar Madonna.
超级巨星麦当娜