The Chameleon

Everybody knows the 'secret' except the Chameleon. But who is the chameleon? To catch them, players must describe the 'secret' with just one word. Too obvious and the Chameleon blends in. Too vague and you start looking guilty. Now let the frantic debating, hoaxing and finger-pointing begin. But be careful, choose the wrong player and the Chameleon escapes.