Educational Portion Of Post: the unseen portion of an iceberg is called a bummock, while the visible portion is called a hummock. This is true, as preposterous as the words are.
“The tip of the iceberg” denotes that much is unseen, unmeasured, and unobservable.
I came up with a tangent phrase, one which denotes the same arc, except that it refers to some people: the tip of the dickberg. (“Dickberg” is now in my dictionary. 🙂 )
Whether it’s true or not, I think it’s clever.
“Geez, Steve is really a jerk,” Susan said.
“What he just did is the tip of the dickberg,” Susan.
On a meta-level, I would use it to express the fact that if there’s a little smoke, there’s probably a basement filled with fire.
And not the smores kind.
Stay tuned for more insights and lunacy.