Mug and wireframe entirely disappeared I accidently hit something and wireframe mode is gone. I'm now in what looks like cycles render, but I cant escape out of it.



My mug is nothing but a grey shadow basically. How do I fix this?
You have turned your viewport shading to "Rendered". 



In order to edit your mesh, you need to switch to either 


Material
Textured
Solid
Wireframe


Solid should be the default mode and is the most common mode for editing. 

You can use shortcuts to switch between modes:

Z --- Wireframe

Shift+Z --- Render View

Alt+Z --- Texture View