A person who thinks they are invincible. Someone who can talk the talk but has to be forced into walking the walk and always has it blow up in their face afterwards. This person usually thinks they are well liked and popular amongst many different groups of people but the minute they leave or are not around everyone trashes them and their stupidity in thinking so highly of themselves.
This person is usually unemployed and going nowhere in life.
"Im glad I am getting where I am going in life and am not becoming an L R Wilder.
Girl: I am the shit.
Boy: nah ur just an L R Wilder