This is the "Slacking On The Job" hat. It can be worn with any required uniform (with or without a shirt.) And is often times used by employees to protest a change in company policy.
This is "What's In That Cup" Hat It is popular among college age students and is often a tell, tell sign of too much fun. When in doubt, look for dilated pupils or slurred speech (assuming your subject in question can actually speak.)
This is the "Good Ol' Boy" Hat. It is usually sported in rural areas and is often worn by NASCAR fans. Please notice example above.
This is the "I Was Out Late Last Night And Can't Find My Pants" Hat. A fashion we hope not to see in our home in the years to come.
Hats Off You You !!