'bumper-to-bumper' definitions:

Definition of 'bumper-to-bumper'

(from WordNet)
adjective
Used of traffic; "bumper-to-bumper traffic"

Definition of 'bumper-to-bumper'

From: GCIDE
  • bumper-to-bumper \bumper-to-bumper\ adj. moving slowly with little space between; -- used of road traffic. bumper-to-bumper traffic
  • Syn: crawling. [WordNet 1.5]