From Pirate Party UK Wiki
Current documents are draft copies yet to be ratified by the party though a vote and finalised by party members.
Liquid democracy is a a form of direct democracy where people can delegate their vote.
How it works
In Liquid Democracy, everyone does indeed get to vote on every issue. But you can give your vote to a proxy. And they can give your vote to their proxy. So, say you don't know much about the space program -- you give your votes on things relating to the space program to someone who has similar political views to you but who knows more about the space program (and they can pass the vote on if they choose). You can give your vote to a different proxy for different issues, and you can change your proxies at any time.