the.com/heap
A pile that achieved enough disorder to earn its own name.
means A messy accumulation of things stacked together, or in computing, a region of memory for flexible storage.
from From Old English heap, a crowd or pile, kin to German Haufe; humans have been stacking and naming the mess for over a thousand years.
ComputingMemory you allocate yourself, manually or otherwise.
Data structureA heap is a strictly ordered tree, ironically.
IdiomA heap means a whole lot, casually.
Old carCalling a car a heap predates 1920s slang.