mouse droppings: n. [MS-DOS] Pixels (usually single) that are
not properly restored when the mouse pointer moves away from a
particular location on the screen, producing the appearance that the
mouse pointer has left droppings behind. The major causes for this
problem are programs that write to the screen memory corresponding
to the mouse pointer's current location without hiding the mouse
pointer first, and mouse drivers that do not quite support the
graphics mode in use.
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