The shadowing or darkening of an obvious light source, causing a dingy area... in most cases nauseating to behold.
For example, the layered car wreckage on the loading screen of Burnout Revenge, causes a shamhole when the car's drop shadow slides in front of a brilliant exploding fireball.
Dude, how dare you use a shamhole!
You're shamholing my style.
Popen my shopen... and while you're at it, jamhole my shamhole.
The ability girls and women have developed to hold several items at once in one hand. The skill has been developed due to the lack of pockets in women's clothing.
I thought she'd need multiple trips to carry her phone, keys, wallet, and Starbucks to her car since she needed the other hand to open the door, but she used her impressive girl grip to carry everything in one hand.