Barmpot

A foolish, silly, deranged or stupid person

Police sergeant- What does he look like?
Rose- He looks distinguished

Onslow -He looks like a barmpot.
Police sergeant- Can you narrow that down a bit? Does he have any distinguishing features?
Onslow -He was carrying a bucket and spade. Daisy- He was going to the seaside.
Police sergeant- With his bucket and spade....
Onslow- I told you, barmpot