What does it mean when you say 'love on the fast lane'?

"Love on the fast lane" typically refers to a relationship characterized by intense emotions, rapid developments, and a sense of urgency. It suggests a passionate, possibly impulsive love that moves quickly, often lacking the slower, more measured pace of traditional relationships. This phrase can also imply a thrilling, high-energy experience, but may carry risks of instability or superficiality if not balanced with deeper connection and communication.