Not sure if this will NOT find it or not but
Do not use any meta tags.
Give it a try.
I'm working on building a web site for someone, and this person would like the web site "hidden" for a while for security reasons. Is there a way to make sure that the site cannot be found by someone who is using a search engine? Any information would be greatly appreciated.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic