Top Definition
Similar to "Breathtaking," this is when a girl is so attractive that it may cause a man to need to or want to ejaculate.
Person 1: Dude, Lia has been looking pretty spermtaking lately hasn't she?
Person 2: You're telling me dude, i'm just going to need about thirty seconds in the bathroom real quick...
by ralphparker December 26, 2010

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