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In the process of wacking off, a man in his own mind 'flips through' images or videos of women he has met or seen throughout his life in an attempt to find the image to wack off and/or climax to. This collection of images IS the 'Wack Off Rolodex'.

"Dude, I totally used my Wack Off Rolodex, flipped to your mom, and got off the other night"
by Jleeballs April 14, 2007