They're talking about Word Defy !
Word Defy is an addictive puzzle game and the social element of leader boards is a nice feature.
The gameplay is kept fresh as your mind races against the 90 second time limit. It also makes this casual puzzler a great time filler, requiring no long game play commitment
Word Defy is a good time filler and way to work on your quick thinking skills. Not bad for a free game!