Visit Google. Submit a query of two words, but don't use quote marks.

Whack only accepts words between 4 and 30 characters in length.

Rule Number One: Your two Googlefactors must exist in Google's view of this dictionary. Not your view; Google's view!

Rule Number Two: Google also is the arbiter of a whack's uniqueness. Look to the right end of the blue bar atop your Google results. If you see "Results 1 - 1 of (any number),' you found exactly one hit = Googlewhack!

Rule Number Three: Google shows you an excerpt of the page you whacked. Look at that text. If it's merely a list of words (such as a bibliography, concordance, encyclopedia, glossary, thesaurus, dictionary, domain names, or plain old machine-generated random garbage), No Whack For You!