What rednecks and hillbillies call the human female on account of the fact that, when seen in the nude and from behind, the female genitalia (i.e. labia) looks like a tiny, split-in-half tail.
by zuba February 2, 2005
 Get the splittailmug.
Get the splittailmug. by Frankie February 5, 2004
 Get the splittailmug.
Get the splittailmug. by JPac August 9, 2003
 Get the Splittailmug.
Get the Splittailmug. by dan101010 October 9, 2006
 Get the Splittailmug.
Get the Splittailmug.