Term created by ESPN's Sports Guy to reference when your level of hunger is just enormous. He used it to reference what Boston Celtics' Pierce, Allen and KG have been like for the 07-08 NBA season.
These guys aren't hungry. They are Fat Dickie's Hungry.
In college, every once in a while, my buddy House and I would get tired of campus food and drive to a barbecue place called Fat Dickie's. Then we'd order an obscene amount of food and chow down -- we wouldn't even talk; we'd just be intensely plowing through the barbecue and occasionally nodding at one another.
dickin sandwich first came to life in Kildare, Ireland when a man driving a white van, saw a beautiful lady and turned to his work colleague and stated. "She'd get a dickin sandwich". He was referring to putting his penis in her mouth. (in Ireland where "mickey" is the slang word for a penis, dickin sandwich may also be known as a mickey sandwich)
"That girl looks hungry for a dickin Sandwich, i'd say she's suck a golf ball through a garden hose"