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When you have sex with someone and they have no discernable rythym, as if they have sex-epilepsy.
- That girl I took home from the bar last night was so hot but she kept moving around randomly like she experienced sexilepsy!

- I had the worst sex of my life this weekend with this girl who went into 'sexileptic' shock!
by Knuckler7 September 29, 2009
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