1) to have sexual intercourse with a woman, withdraw, and then ejaculate all over her.
2) to buy a stock, hype it all over message boards on the internet to make other people buy it, and then sell it after it goes up
1) man i pumped my cock into gail's pussy and then dumped my cum all over her. she looked like a glazed donut!
2) look at this guy trying to tell us to buy XYZ stock. he's doing a pump and dump.
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