The natural progression of language by means of:
1.) Abbreviation (bro from brother)
2.) Word reversal (cool and hot for good)
3.) A need for secrecy (dime bag for $10 of pot or 1/10oz of weed)
4.) Degree of separation (green for marijuana)
5.) Expressed honorific (calling a close friend your brother)
6.) Combination (Branjalina for Brad Pit and
Angelina Jolie)
7.) Any other word not
recognized by the major dictionaries as viable, but which a large portion of the population will
understand the meaning of.
Though he did not allow slang to be used in his
classroom, Prof. Smith was known to call his
students "dude", "man", and "bro"
outside of class in a feeble attempt to regain some of his lost youth.