A quip uttered after a stupid quido from the New York Metro area (long Island, Brooklyn, Etc...) says just about anything about anything. Since the Quido is typicaly very stupid and non-sensible "fuckin-Duh" pretty much somes up his/her statement which is often preceded by "fuck" or "fucking (fuckin)".
"Uhhhh duh yo, yeah I could fuckin kick his ass even dough I am 5'3" tall, fat and stupid with a fake tan." Anyone listening who is sick of looking at stupid Italian (southern hertitage) quidos simply say or think "A fuckin Duh!"
group of 3 friends. 2 lovely girls and a decent looking guy. they are called the fuckin j's because each one of their names begins with the letter j. they are notoriously known for vandalizing bathrooms even though they SWEAR it wasnt them, hardcore moshing at concerts and when they're not rocking your face, the 610 is where they wreck havoc. all 3 also know every line to the movie "means girls" by heart and can and will quote lines for hours on end.
When you are pretending to be something you are not, capable of a skill or trait you do not possess, or in some other way misrepresenting yourself. See fronting.
KRS-ONE is an old school rapper who dislikes so-called "Gansta" rappers who are just fakin' the funk.