The oscillatory motion of the testes of the passive male when he is receiving an anal penetration. Can be used as a unit of measurement in homosexual activity, 1 unit of putamen is standardised to 1 full swing of the testes per second
Beast! thats gotta be at least 5 putamen!
by Anonymous April 14, 2003
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Oh Aaron? He's quite a putamen with all the ladies.
by The Didmeister September 11, 2017
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