lulu
/ˈluːluː/noun
- informal an outstanding example of a particular type of person or thing〈非正式〉典范; 出众的人（或事物）：
as far as nightmares went, this one was a lulu.
就噩梦来讲, 这一个也算得上是很突出的了。
词源
late 19th cent.: perhaps from Lulu, pet form of the given name Louise.