'Highway robbery' definitions:

Definition of 'highway robbery'

(from WordNet)
noun
An exorbitant price; "what they are asking for gas these days is highway robbery"
noun
Robbery of travellers on or near a public road

Definition of 'Highway robbery'

From: GCIDE
  • Highway robbery \High"way` rob"ber*y\, n.
  • 1. Robbery committed on the public roads. [PJC]
  • 2. An excessively high price or fee; -- used especially in situations where the buyer has little or no choice but to buy the item offered. [PJC]

Synonyms of 'highway robbery'

From: Moby Thesaurus