be in the fast lane

1. To be in a very successful position or on the path to a successful outcome. The small tech company is now in the fast lane following the massive success of their revolutionary computer chip. Of course everyone wants to join my business now that it's in the fast lane. Typical. CEOs want to be in the fast lane, that's why we can't get anyone to come onboard with our floundering company.

2. To engage in energetic, pleasure-driven, and often risky behavior. He's been in the fast lane his whole life, so it wouldn't surprise me if he ended up doing something that got him killed. Yeah, Joe's in the fast lane, but, like everyone else, he'll eventually get tired of it and end up settling down. Don't forget—kids who are in the fast lane also end up in the obituaries at a young age.