Definition of Denver boot in English:

Denver boot

noun

North american
  • see boot
    • ‘Unlawfully parked cars are liable to be towed away or locked with Denver boots.’
    • ‘Greg was drunk, so the police put a Denver boot on his car.’
    • ‘On 15 September 1998, in LaSalle, Rosalind Burrowes was loudly objecting as bailiffs bolted a Denver boot on her wheel.’

Origin

Mid 20th century: named after Denver, Colorado, where the boot was introduced in 1949.