A mermaid tail is a costume (usually made of swimsuit fabric, silicone or rubber) that can either be swimmable or just for show.
A mermaid tail allows you to look and feel like a mermaid by putting your feet into a fin covered by fabric to look just like the magical creature.
a mermaid tail is a tail of a mermaid, though some people (typically texans) refer to themselves as a mermaid tail or having possession of a mermaid tail. those with a mermaid tail, seem to be slightly or overly phsychotic.
me: did you here about that girl that found out her boyfriend was cheating on her but didn't care?
you: omfg... YES! that girl is such a mermaid tail!
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. Penguin Books,1992. p. 38)