To stagger.

To stammer.

noun. An attachment to a threshing-machine for raising and delivering the straw from the machine, either upon a wagon or upon a stack.

noun. A output bin in a document feeding or punch card machine (contrast with hopper).

noun. A worker who stacks the shelves in a supermarket.

noun. A participant in sport stacking.

noun. a laborer who builds up a stack or pile