ROT-TEN ON-ION n (rahten unyun) 1. A uniquely round bottom emitting an unpleasant odor.  2.  Stinky Bubblebutt.  3.  A sexy farting booty.  4.  A Rotten smelling onion shaped ass.  5.  Big, curvy, gassy bottom that will make you cry when you peel it.

I am over 18               I am under 18 ROTTEN ONIONZ MEMBERS ENTRANCE