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The act of masturbating to material that is outdated for nostalgic reasons.
Guy 1: "dude I randomly came across an old Spice Girls video on YouTube last night"
Guy 2: "the one with the hard nipples? Did you do the throwback fap?"
Guy 1: "hell yeah! Had to bro that shit got me through some hard times during 8th grade"
by evilrolly July 31, 2011
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