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1.
Ejaculatory orgasm within ten minutes of prior orgasm.

A joy of masturbating youth through college years
My weekly score is up to 40 now. Those encoregasms are great.
by kmfrayed February 17, 2012
 
2.
An orgasm experienced during masturbation or intercourse that followed a prior orgasm which occured 30 minutes or less beforehand.
That hooker was so good she gave me an encoregasm.
by Pathetic White Guy January 25, 2012