Because he covereth his face with his fatness - That is, he not only stretches out his hand against God Job 15:25 and rushes upon him as an armed foe Job 15:26, but he gives himself up to a life of luxury, gluttony, and licentiousness; and therefore, these calamities must come upon him. This is designed to be a description of a luxurious and licentious person - a man who is an enemy of God, and who, therefore, must incur his displeasure.
And maketh collops of fat - Like an ox that is fattened. The word collop properly means “a small slice of meat, a piece of flesh” (Webster), but here it means a thick piece, or a mass. The word is used in this sense in New England. The sense is, that he becomes excessively fat and gross - as they usually do who live in sensual indulgence and who forget God.