I've been at the bar all night long catching up with my old kitchen homies but as far as I can tell this is a conversation about red meat and dry aging.
Red meat is at it's best right before it starts to rot. The problem is that the blood starts to go bad long before the meat. That nasty old beef flavor comes from the blood it is sitting in, not the meat itself.
So this is the secret to great red meat - beef, bison, venison, even pork at times. You need to age it in a way that it does not come into contact with it's own liquid. If you are running a $5 million a year steak house you can hang it on a hook in a temperature controlled meat locker. For normal people or normal restaurants you put it in a perforated pan set in a deeper pan that will collect the liquid without the meat sitting in the liquid for a week or two. The liquid that drains off is blood, you don't want it to sit in it's own blood. The blood oxidizes and it is the oxidized blood that creates the "old meat" flavor; as I've said, if it sits in it's own blood it marinates in it and goes bad quickly, if the blood drains away you are dry aging - I try to age all of my red meat and pork for at least a week before I serve it. You don't want to eat red meat that is still red if you can help it, dry age it until it is brown and then eat it, you will notice the difference.
If it is in a vacuum packed container you can also age it that way for a week or so because the blood it is sitting in will not come into contact with oxygen. This is a cheap short cut, don't do it for more than a week.