Phoofy can be whatever you want it to be. Phoofy may be used as a noun, verb and or adjective. Phoofy may also be used in the plural form as "Phoofies".
"This party is phoofy as hell"
"Yo pass me that phoofy"
"Shotty next hit of that phoofy"
"Wow your phoofies look mad nice in that phoofy ass shirt"
"I'll take a phoofy on that kids chest"
The signature visual element of the tv show, NCIS. When NCIS breaks to and comes back from a commercial, a black and white video image appears of a moment in the episode, accompanied by a noise that sounds like "phoof", hence the name.
Poofyfinger is a derogatory name given to anyone who plays games too much using a mouse. It is the next generation medical term, much like how Carpal Tunnel Syndrome became known in the past fifteen years.
"Johnny, you better stop playing those games, or else you'll develop a poofyfinger"
Doctor: I'm sorry Susan, it is absolutelynecessary to amputate your poofyfinger