An asshole. Brown like the chocolate from a Kit Kat, therefore named after said confectionary snack. Dependant on your location, common variants include: the Mars Bar Throughway, Bounty Bridge or Hershey's Highway.
"That girl has a rich aroma coming from her Kit Kat Junction"
"That's cos she doesn't believe in toilet paper"
"That's cos she doesn't believe in toilet paper"
by jizzmong hunter August 22, 2009