Whimsey

=

A winding engine for a coal mine / A fanciful idea / Caprice

In the black country we say:

Whimsey

This translates to:

A winding engine for a coal mine / A fanciful idea / Caprice

Example Sentence
They used to 'ave a whimsey at the top o' the pit shaft. / That's just another one of 'is daft whimseys.
Description
In the Black Country, a 'whimsey' (or 'ginny-whimsey') was a horse-powered winding engine used at coal mines. More generally, it means a fanciful or capricious idea, a whim.