Dingus. As used by the maintenance engineer at my first workplace to describe anything he couldn’t be bothered to use the right word for. For example, pass me the dingus so I can get the nut undone on the dingus.
He had a lovely turn of phrase. Describing doing his national service as a wireless operator for the RAF in norfolk. They’d pitch up to a field near a town, put the ariels up, scan the airwaves for a bit, then declare that storm clouds were brewing, and pull the ariels down as a precaution. And then sunbathe for the afternoon, or take turns to head into the nearest town and sort some girls out ‘as fast as you could throw them under me’