You Lied song meaning

You Lied criticizes people who get way too carried away with lying. Their stories are so stretches that it's obvious to everyone that they are lying. "Your mother allowed you just one white lie" - compulsive lying usually starts with a small lie that makes you seem better than you are or helps you get away with something. And then you like it and keep lying more and more, by reflex, without even realizing that you lie, and in the end your lies are so unbelievable that no one is buying anymore - "your nose is growing into the 3rd dimension". And you need to do everything possible to learn how to stop before it gets even worse.