plunge down (something)

plunge down (something)

To fall or plummet down something at a high and often uncontrollable speed. The bus skidded on the ice and plunged down the side of the ravine. The roller coaster plunged down the near-vertical drop, making everyone on board scream with delighted terror.
See also: down, plunge
Farlex Dictionary of Idioms.

plunge down something

to run or fall down something. The car plunged down the hill and ran into a tree at the bottom. The bicyclist plunged down the side of the hill at a great speed.
See also: down, plunge
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • come a gutser
  • be down to (do something)
  • be down to something
  • be down to (one)
  • be down to somebody/something
  • come a-cropper
  • come a cropper
  • bounce up and down
  • bear down
  • bogged down