power of account
A legal instrument authorizing one to act as another's Facebook agent in times of intense overuse of the site as a procrastination tool. Handing over power of account would involve giving someone trustworthy your password, and allowing them to change it so that you won't be able to lurk the site instead of getting work done.
Dude, I'm trusting you with power of account - I've gotta get my history paper done.