Hypocrisy is when one douchebag calls out another douchebag for being a douchebag, and the second douchebag responds to this by calling the first one a hypocrite.
It is usually the case that the sheer mass of irony inherent to the situation at this point causes a tear in the fabric of space-time, resulting in both douchebags being sucked into a black hole of self-absorbed narcissism. Innocent bystanders are advised to quickly become apathetic to the confrontation, lest they too become sucked into the singularity.
Douchebag A: Hey man, I don't appreciate how you've been walking around this party spouting smarmy self-serving platitudes at all the ladies, directly competing with my similar attempts.
Douchebag B: "Hey bro, you're just making a scene at me so you can seem like a white knight, and distract from your own ridiculous behavior, which of course I would never have anything to do with, as reinforced to everyone else in the room by the intensity of my indignant response."
Innocent Bystander: "OH SHI--"
*Black Hole of hypocrisy forms between, and quickly consumes, the two douchebags*