Similar in nature to a "glory hole" (holes in restrooms or clubs where people can anonymously stick their dicks in or put their ass against to get fucked.) The only difference being, these holes are located throughout an incestous family's home.
Riley drank the hot load of his brother or was it his father from the shame hole.
The town tramp, the girl that fucks everyone, a sure lay for one in desperation or one highly intoxicated. All men feel the "day after" regret of having entered her hole.
Waking up next to a stinking whale after a night of heavy drinking, Harrison realized he had spent time in the hole of shame.
After doing shots of tequila all night, Todd was inducted into Terri's hole of shame.
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.