in the fast lane meaning

• [American slang]
  Fig. in a very active or possible risky manner. (See also life in the fast laneTypically: be ~; live ~; move~; stay ~.)
    Fred lives in the fast lane. It's lucky he's still alive.

• fast lane:    Noun: fast laneA h ...
• life in the fast lane:    [American slang]a ...
• live in the fast lane:    [American slang]Go ...

Examples

1. who dreams of making it in the fast lane
2. i'm just not cut out for this . life in the fast lane
3. life in the fast lane
4. this is a story of a group of drifters living life in the fast lane in the big cities of japan
5. I wouldn't know about life in the fast lane.