A margarita thought is a thought that you couldn't have come up with on your own. Imagine that you and a few friends go to a bar and start ordering. The first three people, including you, order beers and then it is your best buddy's turn. He turns to the waiter and says "Do you have margaritas, I can't see it on the menu?" Waiter says, yeah, sure, we can whip one up for you. All of a sudden, you feel a sudden urge for a margarita too. You just didn't know that it was an option before.
Probably invented by Thoughtexchange to describe their enterprise crowdsourcing platform before anyone understood that it was possible to crowdsource ideas.
Free healthcare? That's a thing? Total margarita thought.
I hear ya but that's what everyone says... hoping for more of a margarita thought.
Dirty goose martini in Mexico? Now that's a margarita thought.