A man point is what guys give each other, if they've done something manly. Like he scores a number or gets some. Sometimes said like 1up (in mario). Each guy starts with 200 man points, and to give a man point to someone else, you loose one of your own. You automatically gain 100 man points each time you have sex with a different girl.
bob: Yeah I saw a nipple!
dan: Man point +1