mit dem Klammerbeutel gepudert sein
to be not quite right in the head; to be a bit daft
Origin
The expression arose only after 1900. The popular mill explanation is considered untenable; more likely the image alludes to the powdering of hair and wigs in the 18th century. It was popularised in part by satirists such as Kurt Tucholsky.
Building blocks
Words in this expression
Examples
Du willst bei diesem ? Du bist mit dem Klammerbeutel gepudert!
You want to go swimming in this weather? You must have a screw loose!