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To smack between someone's legs repeatedly very fast, moving quickly like a sperm tail.
I was walking up the steps when all of a sudden, someone sperm tailed me from behind and I almost fell over.
by killerqueen33 November 19, 2008
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2
When some holds a roll of toilet paper out of a moving car and let it unravel as you move down the street looking like a sperm tail.
Guy 1: I just made some serious sperm tails with some friends.
Guy 2: how much TP did u use?
Guy 1: Alot
by Arex Wrong September 10, 2011
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