A person or situation that looks like a fuck up from all possible angles.
Originally coined in S03E01 of The Thick of It:
Not only have you got a fucking bent husband and a fucking daughter that gets taken to school in a fucking sedan chair, you're also fucking mental. Jesus Christ, see you, you're a fucking omnishambles, that's what you are. You're like that coffee machine, you know: from bean to cup, you fuck up.