The patch of hair on a man's lower back in the same area that a woman would get a "tramp stamp" tattoo. This patch of hair is typically the only hair they have on their back, and is often similar in size and shape to a tramp stamp.
A small cut, scraped, red, or scarred patch of skin on a mans lower back as the result of falling onto the region. Usually caused in an accident from riding a skateboard, BMX, or lesser "action sport" item such as inline skating or longboarding.
1. I fell on my back trying to ollie up a curb and got a wicked man stamp.
2. Keep on doing that rail with your shirt off and you're going to end up with a man stamp.
The act similar to teabagging an opponent only instead of using your nutsack, you stamp your unsuspecting foe on the forehead with your anus (aka wagonwheel). Preferably after a wet or "juicy" fart although this is not a requirement as the act is often punishment enough.