A person that enjoys moving vast quantities of Hob nob (the tasty oaty biscuit) using only the anal cavity.
Daniel: I've got a real bad craving for a hobnob!
Kelly: Wait a minute I'm sure I've got an extra one up here somewhere! There it is!
Daniel: Did you just pull that out your arse?
Kelly: Yer, and there's plenty more where that came from!
Daniel: WTF, Your a Hob-Nob smuggler!