1
general::
A situation involving high pressure, competition, and, especially, rapid success or advancement. For example, He was definitely on a fast track, becoming a partner after only five years in the firm, or This company was on the fast track in software development. This term alludes to a dry, hard horse track that enables horses to run at high speeds. [Colloquial; mid-1960s] Also see FAST LANE.
American Heritage Idioms