(1). An obviously beneficial action to be taken, often used during staff meetings by sycophantic employees (see yes man) to curry favor with a manager who just suggested the action as if it were a stroke of genius.
“Selling those children was a no brainer. What’s next on the agenda?”
(1). A rule that is kinda, sorta meant to be followed (you know, like the Tax Code).
“Well, I wouldn’t say it’s a hard and fast rule … more of a best practice, I think. Irregardless, you might want to stop smacking your secretary in the ass every time she gets your travel right, Bill.”