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The act of defecating after a person has engaged in anal sex and been the 'receiver'.

i.e. He did me in the ass so I took a humpdump on him.
Humpdump in your mouth yo!
by Jake Sklar November 28, 2004
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The act of following these steps:

1) Ask a hot girl out.
2) Fuck her.
3) Dump her.
Hey man! I gave Courtney the good old humpdump!
by johnr69 March 24, 2009
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