Anyone heard of this? The idea is to type two English words (as defined by Dictionary.com) into Google, without quotes, and get only one result.
We're all addicted to it in this flat at the moment, I think we're up to 10 whacks now. You can check the legitimacy of your whack and register it here:
http://www.googlewhack.com
Explains googlewhacking in more detail too.
Good thing to do if you'er bored in a lab (besides spamming the Goof Off forum )