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1 definition by subpixel

 
1.
One's brain, or, more specifically, one's collection of memories (and capacity for additional memories). An allusion to the notion that one's mind is like a sponge.

cf. hard drive, floppy drive, thumb drive
"I can’t remember much more... Hard drives nearing full. Sponge drive doesn’t work so well for digital assets."
by subpixel April 25, 2009