The wall that your bed is pushed up against. The booger wall is not the entire wall, but just the section of wall that begins even with your head and runs along the edge of your matress to about mid-thigh, or as far as you can reach toward the foot end of your bed. This length of wall extends from the top edge of your mattress down the wall approx 4 inches. Boogers are picked while lying in bed and wiped in this area.
My mom was cleaning my brother's bedroom and pushed the bed away from the wall to vacuum. She was disgusted to discover his booger wall.
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.