For so many reasons, Bobby Singer calling anyone an "Idjit" has become a staple and joy of any Supernatural fan. Whether it be talking with the boys or the king of Hell himself, one can always expect to hear an Idjit fly out of Bobby's sassy witty mouth.

The Entity\n\n The Cosmic Entity might be the most powerful Supernatural monster in history, but there is not enough known about it to rank it very high on this list. The Entity predated God, the Darkness, and Death. However, the full power of the Entity is unknown, as we still don't know what its specific powers are yet.