Finished

I finished my homework, yay! Now I need to go to the bathroom. Then I might practice my dance, I dunno. I kinda feel like it and kinda don't. Is kinda a slang word? Is y'all a slang word? Is slang a slang word? Are slang words in the dictionary? Please answer all my questions! I must know the history of slang for a report! I have a basketball game tomorrow already. It is against St. John Lombard. Is it St. John's or St. John? I need that for another report. Just kidding, I have no more reports right now. I just finished them all. So I have just finished two things, my reports and my homework. What a lucky duck I am! But seriously, I want to know the answers to all of my questions just 'cause. Oh, and can using 'cause be a slang?