Naked Mermaid Stance 

Striking a pose while lying down on your side

Check out that hot chick doing the naked mermaid stance!

Naked Mermaid Stance by MC MilfHunta August 9, 2010

Going mermaid 

When a woman decides not to speak just to see how long it takes before someone notice that she has said nothing

I'm going mermaid, he never stopped to let me speak anyway so I keep my mouth shut.

Going mermaid by Sugar-E September 25, 2017

Gutter Mermaid 

When you fuck a girl and drop a load in her, then she slips between the mattress and wall flopping around.

When I was done with Anna, I couldn’t find her but there she was stuck like a gutter mermaid.

Gutter Mermaid by @tfresh September 17, 2020

space mermaid

a really hot eccentric girl, who always appears to be "spaced out"

"That artist Ragzy is such a space mermaid bro."

space mermaid by Lego Wonderful May 9, 2023

Frankie Mermaid

a man who some would say is... swimming in bitches.

Frankie Mermaid: "What's my name?"
Prostitute: "Frankie Mermaid.."
Frankie Mermaid: "And why is that?"
Prostitute: "Because you are swimming in bitches."

Frankie Mermaid by nobody important :) September 6, 2020

The Mermaid Theory 

a theory that a woman, no matter how ugly she may seem at first, will eventually look beautiful to you if you see her every day all day.

Based off the theory that sailors used to spend months at sea and started to slowly see manatees turn into mermaids.

Joe: Dude Kelly is so hot!

Tim: Are you nuts?! It's probably just the Mermaid Theory. you have her in every class.

The Mermaid Theory by Fatchooo January 20, 2011

River Mermaid 

A slut or promiscuous person, esp. flirtatious young women who reside at cottages/cabins during summertime.

"Man, your neighbor is hot!"
"Oh, Zyn? Yeah, she's a total river mermaid."

River Mermaid by panicmania April 18, 2013