Definition of "lulu"

lulu

/ˈluːluː/

noun
plural lulus
1. (slang) A remarkable person, object or idea.
  Quotations
  Seriously, I mean it: From Russia, With Love is a real wowser, a lulu, a dilly and a smasheroo.
  2013, Andrew Lycett, Ian Fleming, page 301
2. (slang) A very attractive or alluring person.
3. (slang) A very bad mistake or error.
4. (slang) A fixed allowance paid to a legislator in lieu of reimbursement for actual expenses.