You know it when you see it.
When you see that one dunk, that one throwdown that's simply jaw-dropping. When you either sit in stunned silence thinking, "did that just really happen?!?" or when you jump out of your chair, spilling your beer (or non-alcohol beverage for all you kids) everywhere, screaming "holy ****!!!"
Only one thing can make a monster dunk that much sweeter—when a defender goes up with the foolish attempt of making a play on the ball, then realizing halfway through the play, "I'm about to get slammed on."
So, without further ado, let's jump right into today's list: the top 20 posterizing dunks of all time. The ones where the defenders are probably still a little ashamed or embarrassed, even to this day.
(Note: unfortunately, as great as YouTube is, it can't archive footage from way back in the day. That's why you'll notice that guys like David Thompson aren't included, while Darryl Dawkins is only on here once. But to be fair, they had more than their fair share of posterizations.)