The suffix "y", when appended to a word, indicates a propensity toward exhibiting the characteristics of that word. IE, to be "funny" is to exhibit the characteristics of "fun". One might say that to be "funny" is to be "full of fun". Therefore, to be "whacky" is to be "full of whack". Now, the term "out of whack" means that something is not working correctly. And the term "whacky", previously defined as meaning "full of whack", also means that something is not working correctly. Therefore, to be "out of whack" and to be "full of whack" mean the same thing. That whack is some weird shit!

The only other word that I know that exhibits this peculiar characteristic is "squat". To say, "I got squat when I traded in my car" or, "I didn't get squat when I traded in my car" both mean the same thing. Squat is of so little value that it doesn't matter whether you get it or not. You're screwed either way.

I hope this diatribe did absolutely nothing to ease your confusion.

Bruce
aka Bee-dubya-ell Royal Poet Lariat of Mississippi
aka Knower of Things

Note to King khandu: Please don't assign me any more titles. Signing off is becoming a major pain in the ass.