up on (one's) bumper

up on (one's) bumper

Extremely close to one while driving in a car; touching or right next to the bumper of one's car. The guy got right up on my bumper, blasting his horn until I finally moved over to let him go past. She came up on my bumper so I couldn't get into the parking spot.
See also: bumper, on, up
Farlex Dictionary of Idioms.

up on someone’s bumper

verb
See up in someone’s gold ones
See also: bumper, on, up
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • up on someone’s bumper
  • stop behind
  • stop behind (someone or something)
  • bumper
  • bumper to bumper
  • bumper-to-bumper
  • bumper sticker
  • car
  • live out of (one's) car
  • clunker