In a variety of contexts over the past month, I have heard the phrase "slam dunk"* used seemingly a hundred times to refer to situations that were easy, simple, or straightforward. The phrase, of course, has been common parlance for a long time, and I've probably heard it used closer to a thousand times in different conversations. And yet, I have never heard it used by someone who seemed like they could actually slam dunk a regulation basketball on a regulation court. Or, for that matter, even if you lowered the hoop by a foot.
* a.k.a. "slam dunker" in the idiolect of certain immigrant bloggers I could name.