To talk about the weather being brenzlig is weird all together but I'd understand if it looked to be very inconsistent. When I look at the forecast, all this rain .... nothing brenzlig at all. Not the tiniest risk to see a sunbeam until ... we don't even know as my forecast stops next Friday
Time to let the shutters down and paint their inside in light blue.
It actually means splashing water around, for example small children in a bathtub. I think it’s Berndeutsch. In Zürideutsch you would say “götschä” and in high German “ plantschen”.