The phrase "it's a thing" is typically used to end a conversation peacefully if it is straying into potentially fractious terrain.
Jake "Coming from the Chicago political machine Obama is either dangerously nieve or complicit about the selling of his senate seat."
Mary "The fact that he didn't know and was not involved in what was going on in Chicago while ramping up as president of the United States is not an indicator of incompetence!"
Jake "It's a thing"
Bob "How long have you been playing WOW?"
Bill with some pride "Slightly over 24 hours"
Bob "That is crazy, I think you are in need of an intervention"
Bill "It's a thing."
the answer from a jeep owner to a non-jeep owner when asked by the non-jeep owner why there is a tight emotional bond between two jeep owners that excludes other car owners.
Person 1: "Why did you just wave at that guy in the jeep?"
Person 2: "it's a jeep thing; you wouldn't understand." Smirks to himself
can be used to describe any interesting situation your friend happens to get yourself into. Saying it gets you out of all explaining to anyone who may ask, as they also will know what "a morgan thing" is, so no further explanation is necessary.
It typically involves getting lost a few times, doing some spontaneous things, and basically having a good time. Nothing goes as planned, but everything works out fine in the end :)
"oh, hi dad...yeah, i'm at this Crashed ice event and then we're...don't worry, it's a Morgan thing."