The act of drink coffee while taking a shit. Some people will have breakfast while preforming a Good morning, god bless It normally take place in the mornings. It is more common the you think but Ethan Klein brought the term to mainstream.
Going into the bathroom with some egg salad and a coffee, and just shit and have your breakfast on the john.
It was originally coined in by h3h3 when he was asked to make the act of shitting and drinking coffee in a communal bathroom less taboo.
John: Man, the bathroom has been backed up for ages thanks to Jerry. He's doing a Good Morning & God Bless
Adam: 'good morning and god bless'?
John: That's when you shit, drink coffee, and eat breakfast on the toilet.
Adam: That sounds like a good morning to me honestly!