Expression used here and there by Almost Everyone
n. • /ˈplat͜sreːɡn̩,Plátzregen/ • A very sudden downpour of heavy rain, often in a small area.
''Warte den Platzregen besser im Laden ab.''
''Better wait in the shop until the Platzregen is over.''
3 out of 5 German speakers have heard this