Adj.-something done purely to get chicks
(like the fact that Peacock's have long beautiful tails purely to get laid).
Confused Freshman (staring at hug course bulletin): What class should I take?
Experienced Senior: Yo man, you should take French-It's such a Peacock's Tail. You'll be boning hot girls in no time.
Confused Freshman: You are wearing such a tight pants-you have a huge moose knuckle.
Experienced Senior: No worries. It is a Peacock's tail.