What is red rag top?

"Red Rag Top" is a song written by Jason White and Tom Douglas, and recorded by country music artist Tim McGraw. It was released as a single in May 2002 and became a top 5 hit on the Billboard Hot Country Singles & Tracks chart. The song tells the story of a teenage romance that ends in an unplanned pregnancy and abortion, and how the experience haunts the narrator throughout his adult life. The title comes from the red convertible car where the couple shared their first sexual experience. The song has been praised for dealing with a controversial topic in a sensitive and realistic way.