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1.
a disgusting growth on the back of your head, rejects all the ladies and smells like 400 decomposing babies in death valley.
Person 1: Omg! Whats that on your head?! EW IM NOT HAVING SEX WITH YOU ANYMORE.
Person 2: Sorry! Its just my mantail!
by AsanteSwagger March 25, 2011
 
2.
a man's camel toe. When a man's penis can be seen through his attire
Hey, he showing some serious man tail.
Hey dude, can you see my man tail in these shorts
by oldriverschool August 08, 2007