Eyes Slot

It seems like that phrase was used to describe that the eyes are so small that it's as small as a coin slot from an arcade machine or gum ball

a slot through which coins can be inserted into a slot machine

coin slot machines in vegas females (no titsass, short height, coin slot eyes, coal black hair, shit coloured eyes, no curves, flat face, dirt coloured nipples and

coin combo hurricane horse slot machine She had scary zombie X-ray eyes And of course, there were obligatory florist-marbles-glued-onto-knick-knacks (People, I beg of you