To have reached the state of purest sexyness. A person who has reached the ultimate stage of muneility has females at their knees begging for him. Once a man reaches muneility, there is an automatic increase in the size of his penis, brains, and athletic ability. One who has reached muneility is the best at everything that there is to do in this world.
"Hey, did you know that Sam reached muneility yesterday?"
"Yes actually I did. Yesterday we had the best sex I've ever had in my entire life."