dough ears is a frase commonly used to describe someone who seems to be a nice person, but he's actually a twat.
He uses a technique where he says gay and annoying things and then is really nice.
oh yeah, his ears are pretty dough
dough ears: oh hey nearnshaw, how are you ?
nearnshaw: yeah i'm great thanks, you ?
dough ears: great you fucking twat, go die in a hole, I'm just joking I love you, not really you faggot. oh I really like your shirt by the way.