thunder-plump
noun Scottish & Northern Irish
A heavy and sudden shower of rain accompanied by thunder and lightning: a very heavy thunder-plump in summer...
- Within 15 minutes a large black cloud looms, which soon produces a thunderplump.
- There comes a thunderplump of rain.
- Another thunderplump cascaded down on him just as he was about to hit his tee shot at the tenth.
Origin
Early 19th century: from thunder + plump2.