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The current date visible in a photo, e.g. written on a peice of paper or personin photo's skin, in order to prove the photo is genuine. Often used on /b/ when people post pics of themselves.
OP: Hey look at my huge titties

Anonymous: Timestamp!!!
by Dudey McCool October 17, 2009
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A photograph capturing a treasured moment in one's life; a photograph capturing a moment in time.
The photographer from Flight One Studios was hard at work taking time-stamps at Tiffiny's wedding.
by F1S October 03, 2013
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