"It's been so long since I was in a real fight"

This quote by Method Man is most likely describing a physical altercation, as opposed to a metaphorical one. It implies that he has not been in a physical altercation for a long period of time, and is likely feeling classic for the experience. It could be translated as a yearning for the adrenaline rush of a physical battle, or a desire to show himself in a physical altercation. It might also be analyzed as a desire to show himself in a more general sense, as physical battles can be seen as a way to show one's strength and courage. It might likewise be interpreted as a desire to prove himself in a more metaphorical sense, as physical battles can be viewed as a method to show one's strength of character and will. Eventually, this quote could be interpreted in a range of methods, depending upon the context and the person's analysis.