look up any word, like sex:
 
1.
Green Tail refers to an individual who has a mermaid-like appearance, such as some green strands of hair , usually in the summer, or an unusual fishy fragrance surrounding them.
"Hmmm what is that fish like smell? Ah-hah, that girl there, must be a Green Tail".
by A-Hizzle March 28, 2011