Meating up is the ceremonial ritual where a man gets his balls back from the wife (or lady friend) for the weekend. Especially, for a manly event like camping, shooting, drinking or just sniffing gunpowder with his boys.
When a group of well known degenerates assemble in order to denigrate their enemies and sometimes each other, consume coma inducing amounts of substances, and perform any number of questionable, dangerous, or otherwise ill advised activities. These gatherings happen at irregular intervals and are generally composed of a caustic mix of borderline personalities.
There are often promises "hearty soups", but rarely do said soups materialize.
"Are you heading to Johns this weekend?"
"I might, it sounds like a real honchos meat up, though. I might skip it."