The song "BackDoor" by K CAMP talks about his success and the wealth he has accumulated. He brags about his designer clothes, expensive accessories, and the money he has made. The lyrics also touch on his romantic encounters, with references to getting intimate and enjoying the finer things in life. Overall, the song is about living a luxurious lifestyle and the perks that come with it. It's a typical hip-hop track that glorifies material possessions and success.