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

Barmpot

Old fashioned word used in the north of England to describe a person who is mischievous or clowning around. Often proceeded with an adjective; silly/daft

Stop running in the house, you're gonna break summat ya silly barmpot

Young boy: "Were you there at Jesus's crucifixion Nan?"
Old woman: "Don't be daft you cheeky barmpot"