Spanish speaking dude at my last work was talking about Trump, and said something akin to "he's got the mierdas touch!"

Mierda is the Spanish word for "shit".

Fuckin 10/10.

What ? who uses it like that ?

A goose that lays eggs composed of heavy metals has serious health problems, yet we value it.

He's got the Meidas touch,

But he touched it too much.

Goldmember!

It's like monopoly the board game. It was originally designed to show how terrible and parasitic landlords are as a concept, then hasbro got their hands on it and it became "yay capitalism, bankrupt all your friends".

What with the "WE" part?

I've never used it.

Only lawyers and people with an MBA say shit like that. The rest of us just call it being a greedy predatory prick.

Yeah that is the modern usage, sadly, the complete opposite of what the original meaning was. Another example of this is "blood is thicker than water", meaning family should be held closer than friends. The original saying was "The blood of the covenant is thicker than the water of the womb", literally meaning the opposite.

I’ve never seen it used to describe being good at what they do. Can you provide an example?

Welcome to Capitalism!

Classic example of the game telephone, played by millions through the ages....

Who is "we" here? I've never used it that way, and I think I've nearly always seen it used correctly.

Cultural tell, IMO.

I look at it as we as a society have reinforced the lesson with our modern day use. Of course the lesson falls on deaf (greedy) ears.

It's also the slogan for a car repair chain. It's false advertising though, as they do not turn your car's muffler to gold.