.
Having a penis that does what it's supposed to do.
Yeah, she's got balls huh? ;)
Andy B, Yeah, being able to pee standing up is very manly.
If you can grow a mustache your a man, if you feel a woody between your legs your a man, if you're the best at being a chef, sports, commanders, designers, lawyers, CPA's, Scientists, etc. YOU'RE A MAN!!!
Good values or characteristics that make a man a good role model for others.
Manliness is next to Godliness. Or something like that.
They have a tail between their legs.
LOL:)
Hair. Some scruff.