"The Cum Run" is what you call it when you run across the hallway to the bathroom while covered in your own ejaculate. This would occur when you have forgotten to bring tissues to clean up after masturbating. (The running part is to prevent cum from dripping on the floor.)
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.