Someone who becomes successful and makes it to the big scene forgetting where they came from and instead develops a massively big fucking ego.
Usually found in creative industries like music, film and art.
Generally, it's good advice to not be a Floyd Lavine.
"Hey man, would you mind checking out my mixtape?"
"Nah, do you know who I am? I'm Floyd Lavine."
*throws his USB stick on the ground"