English slang from the Westcountry where it means to eat noisily, greedily and rapidly without paying any attention to table manners, the quality of the food or the effect on other diners. The process is usually interspersed with grunts, belches and slobbering and would put a starving hyena to shame.
Derived from the hierarchy of Italian organized crime families, the yardfather is the most highly respected man inmate in prison. The yard, being the outdoor area were inmates are allowed recreation time to exercise, play basketball, shank each other, etc.