A book or whatever that people read to look for definition with big ass words that you'll have to look for again only for it to define the word with "ly" in the end and it won't help. So you look the word up in urbandictionary or look if someone already asked what the word was in yahoo answers.
Me: What's the definition of "slut"?
In the dictionary: A person, especially a woman, considered sexually promiscuous.
Me: What the hell is promiscuous!??!?!