2. The mental database of naughty images to which one can spank the monkey when more conventional pornography is not, uh, "at hand."
2. My mom threw away all my porno mags. Now I have to rely on my spank tank.
"Fernie never goes to the Spank Tank he only uses his wack shack, he's high class."
"The Spank Tank is for public use, but a wack shack is for private enjoyment."