(adj.) Something that is tight, solid, quality, etc.
Coined by John "Cakes" Auville of the WHFS Sports Junkies. Cakes wanted a home that would not be damaged by termites. Specifically, he expressed a wish for a "money metal house." Originally, "money" (meaning awesome, tight, etc.) modified "metal house," (i.e., a house not made of wood), but now "money metal" is an adjective of its own, and does not require the object it is describing to be made of metal.
"It's a money metal show."
"I'm wearing my money metal Dr. Jthrowback."
"That ref made a money metal call."