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Something which has reached the next level of positive status. Many things can be good, great, awesome, amazing. Only somethings can be "Proper Fitted".

The word originates from Fitted hats. These fitted hats make the wearer look good because they are properly fitted. In other words they make the wearer look Proper Fitted.
Bob: Look at that ass!
Joe: Proper fitted!

Bob: I just found $50.
Joe: Proper fitted!

Bob: Get the fuck away from me bitch!
Jill: Okay.
Bob: Proper fitted!
by African Nigerian American Goon March 09, 2011