Collect a STOCKPILE of is a phrase that means to gather and store a large amount of something. The term can be broken down into two words, 'AMASS' and 'STOCKPILE'. AMASS is a verb meaning to accumulate or gather a large amount of something, while STOCKPILE is a noun meaning a large supply of something stored for future use. Collect a STOCKPILE of is a phrase used to describe the act of gathering and storing a large amount of something for future use.