A sex act requiring putting your partner face down in a sink filling with water. The object is to see if you orgasm before they come up for air or pass out.
We made a complete mess in the bathroom doing The Dirty Mermaid , but my wife love the challenge of holding her breath.
by Mister first class March 11, 2018
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A sex act. When you put a live fish up a girls ass and the guys ass until only the tail fin shows. Then you fuck.
My brother and his girlfriend took my betas and committed the double dirty mermaid.
by Mochathiccthot August 18, 2018
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A female so stanky that the only way you could fuck her was with her genitals underwater, ie a bathtub.

Being sure to avoid any situation that could make bubbles allowing her her yeastie Twang to reach the surface, ie a hottub
It stinks like dog food in the bathroom and the floor is soaking wet..... you had that dirty mermaids around again haven't you! Make sure you clean that bathroom and whatever the hell that is is around the edges
by Le on January 26, 2022
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