Hit by the stupid stick, inhaled the buffoon balloon, all foam no beer, a few fries short of a happy meal. The people in this list embody all of the above. Don't be too hard on yourself just because you don't know when to use whose and who's, because there are people out there who get "wrap" confused with "rape" and who get rectal thermometers confused with oral thermometers.
But actually, you should really know the difference between whose and who's. Go look it up after you read this article so you don't end up like the people in it!
#1 There isn't an app for everything
There's probably an app to test your IQ though. That might be helpful.