Top Definition
An orgasm that is so strong that the resulting undulations register on the Richtor Scale. A seismogasm can occur in either males or females. While a female seismogasm can often have high seismogasmic aftershocks, a male seismogasm usually results in a sticky gym sock, a cigarrette, and often sleep.
I gave her a 7.0 seismogasm wilth 4.0 aftershocks.
av AFIZZY 14. januar 2014

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