This is the smell substances that grows around your ear piercing. It is know to be chronic bacterial infection. Thus the ear produces an ass like odour.
Oh please darling I rather you not lick my ear tonight it smells like ear butt.
It is what happens to you ear when you pick up a Butt Dial before the inadvertent caller quickly hangs up as you are listening.
Jimmy gave me a case of Butt Ear when his phone kept butt dialing me on his walk.