supersecret
adjective
su·per·se·cret ˌsü-pər-ˈsē-krət 
: extremely secret, private, or confidential
a supersecret government agency
Word History
First Known Use
1891, in the meaning defined above
- the last post
- the last rites
- the last someone heard
- the last someone saw
- the last straw
- the last thing on someone's mind
- the last word
- the last/final word
- the last/previous couple of
- the latest
- the latter
- the law
- the law of averages
- the law of the jungle
- the law of the land
- the lay of the land
- the least of
- the least of someone's worries
- the least someone can do
- the Left
- the length and breadth of
- the less said, the better
- the letter of the law
- the life and soul of the party
- the life of Riley