If you type a search term into a search engine and only get one result, that result is a googlewhack. Presumably, a true googlewhack is one found on Google.com
No googlewhack lasts for long, as the Internet is always expanding and sometimes when people hear of a googlewhack, thy make a new website containing the search term and spoil it for everyone.
> Search: adjunct puggle
> Result:
> HoadWorks - May 2000 Archive
> ... character MAROON 16) a vociferous soccer cry/cacophony/a cone's adjunct GOLDENROD
> 17 ... fart (arise at the crack of dawn), [ 1 ] knedle, [ 1 ] puggle (baby echidna ...
> www.hoadworks.com/may2000.htm - 70k - Cached - Similar pages