Top Definition
During sexual intercourse moments prior to ejaculation obtaining a live platypus and striking your partner in the middle section of their back, while in doggy position, firmly enough to make a distinctive "whapping" sound. Upon appropriately disinfecting the area boil the platypus live for 7 - 8 minutes and consume to your hearts content.
I platywhacked her so hard last night that we only had to boil the platypus for 6 minutes.
by Gutzorz September 21, 2010

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