This is a very popular thread at the StarWars.com forums, originated by The Dark Moose.
You take any quote or sound bite from any poster and post it here without any explanation as to what sort of conversation they were in. The most popular way to do it is to make it sound like something dirty, but this certainly isn't the only way.
Often times the OOC quote will speak for itself, but if you want you can add some comment beneath the quote, as in my example below.
Remember: don't be malicious about it. This is supposed to be fun.
Can't get it to work. Odd.
They make little blue pills for that ya know.