Define Good Day To You Sir Meaning

Up yours.

An insulting end to a conversation.

Legend has it, that a man by the name of Roger Tellenfield was walking by one of his friends one day. His friend looked over and said "I am having a good day". Roger was having a horrible day so he pulled out a gun stuck it to his own head and said "Well good day to you sir" and shot himself. Since then this phrase has been used by many as a good way to end a fight or a good way to say good bye. .

A short greeting that was a nice way of saying "Hello." Has since been replaced with:
1. Fo shizzle my nizzle!
2. Wassup?
3. What's happenin'?
4. What up bra?
5. YOOO!
6. How are ya?
7. I'll give you five for her.
8. Hi.
9. Hola, mi amigo, como estas?

Somthing said by low level employees of hotels, cafes, tea-and-crumpet shops, and most of England (Except Northern Ireland, where it is replaced by "Top O' de mornin' to ye, laddie!").
TransGender: 'Sir' can be replaced by 'Ma'm'.