When you take a dump inside of a urinal, named after the erstwhile Miami Dolphins Quarterback.
"Yeah man, every single stall was full and I was rushing to my meeting so I just had to drop the trousers and pull a Dan Marino."
As you are pooping, before the poop leaves your butthole you grab your penis and use it as a firehose and cut the poop in half #ri #mg #scripps
I did the Dan Marino Challenge the last time I took a dump, it was insane
You start hard then just fuck it up and leave it smelling like fish