Mexican overdrive

Mexican overdrive

slang The act of coasting downhill in an automobile with the gears in neutral, with the aim of either saving fuel or making the vehicle go faster than would otherwise be possible. He rolled down the mountain in Mexican overdrive, but as he reached a bend in the road, the truck was going too fast, and it went careering through the guard rails and into the ravine.
See also: Mexican, overdrive
Farlex Dictionary of Idioms.

Mexican overdrive

the neutral gear position used when coasting downhill. US informal
This expression originated in the mid 20th century, especially in language used by long-distance truck drivers.
See also: Mexican, overdrive
Farlex Partner Idioms Dictionary
See also:
  • save for
  • save for (someone or something)
  • coast
  • coast along
  • hit the gas
  • pinch and scrape
  • stick shift
  • second gear
  • save oneself
  • make good, etc. time