Faulty, in some unspecified way.
From the PK Dick short
story Autofac, where the word 'pizzled' is used to confuse a robot who keeps delivering unwanted milk. Since there is nothing wrong with the milk, the robot will not
stop delivering it,
even though the humans don'
t want it. But when the humans say that it is 'pizzled', the robot is forced to fill in a compaint form which ultimately results in the downfall of the robot factory system.