Why is it called slang?

Related questions

1. What is the good word?
2. Are names words?
3. Is Armography a word?
4. When did word become slang?
5. What does between you and me mean?
6. What is the meaning of put across?
7. Will put in a word?
8. What is word English grammar?
9. What is Fanny short for?
10. What does word mean in slang?

Tags

1. #slang
2. #appeared
3. #obscure
4. #disreputable
5. #applied
6. #classes
7. #express
8. #unconventional
9. #probably
10. #earlier
11. #london
12. #speech
13. #itself
14. #print
15. #first
16. #around
17. #words
18. #origin
19. #criminal
20. #phrases
21. #either
22. #however
23. #something