http://www.cracked.com/article_16108_bizarre-history-10-common-sayings.html

The three-parts nightmares bit on #4 made me literally "LOL" at the Internet.

Fornication Under Consent of the King!!!! is another one used quite a bit, many times out of context =P

http://www.cracked.com/article_15699_9-most-badass-bible-verses.html

It has been a long time since I laughed that much, gladly it was time to leave office when I read it, I managed to keep it at bay until leaving, but when I was outside... I loled!