What is Blue Hat?
1.
Boston area slang - One who is different simply for the sake of being different. Often wears dirty old clothes and does stupid, outlandish things in public for attention. Wants everyone to know they are different.
"Ayo, you seen those blue hats carrying around dead squirrels our front the building son? Dudes are wilin'."
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1. 
That minuscule fraction of time it takes your brain to realize that you've just made a GIGANTIC mistake and reconcile the fact that..