Looks like a die clash similar to other common dates. 

I agree. Clashed die

14 hours ago, Blulincoln said:

Looks like a die clash similar to other common dates. 

I agree.  The easiest way to understand what you're seeing is to "flip" an image of the other side of the coin and compare.  I circled the obverse design element I think was imprinted into the reverse die.  This might have already been cataloged as VAM-3B2.  You can check out all of the currently cataloged 1921 P Clashed Die Varieties at VAMWorld.com.

Thanks alot for figuring that out.  The picture on VAMworld has the exact same attributes as my coin. I finally understand exactly what people mean by 'clashed.'