|1.||the outside lane on a motorway or dual carriageway for vehicles overtaking or travelling at high speed|
|2.||informal the quickest but most competitive route to success|
|the offspring of a zebra and a donkey.|
|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|
Also, life in the fast lane. A lifestyle that involves free spending and self-indulgence, and sometimes also dissipation and danger. For example, They're finding that life in the fast lane can be very stressful. This term alludes to the highway express lane used by faster vehicles to pass slower ones. [Colloquial; c. 1970] Also see fast track.