A guy in a group that has the most experience in life. Someone that knows how to treat a woman right. Someone that's really good at a certain sport that nobody else can compete with them.
He's just a man among boys. Mama there goes that man, hes a man among boys out there.
A selfie that obviously was taken by someone who does not take selfies regularly (e.g. angle off; face half in the picture; too low, too high etc.) The kind of selfie that a man might take.
Rob, not at all a vain person, took the worst selfie I have ever seen! It was a man's selfie personified!