An oldie but a goodie for wasting time.
Googlewhack is a game where you type two words into a Google search to yield only one result (it even has its own website). It’s pretty difficult but infinitely rewarding (as all time wasters are). In a few minutes of trying the best I got was two results for “shwar aardvark”. You have to spell things correctly of course or else you’re cheating (even with spelling errors it’s still hard since lots of people can’t spell).
The first rule of Googlewhack: don’t brag about your Googlewhack find on the internet; you’ll unGooglewhack yourself. So if you get one we’ll just have to take your word for it.