The word used to describe 1.(a) website(s) that is so amazing that Wikileaks craps their pants when they try attempting to hack it. 2. Top secret documents that if released by Wikileaks would result in thousands of riots around the world until every person held responsible for the release was brutally executed.
1. Urban Dictionary is the most amazing un-Wikileakable website ever that Wikileaks knows wtf would happen to them if they tried hacking it.
2. If Wikileaks published Un-Wikileakable documents such as one stating that the Pope had sex with prostitutes around the world and was really Muslim then they would have the shit kicked out of them for it.