L = Lysandre
A phrase used to describe Lysandre, a loser, at times they could be annoying as fuck and is used because they are a loser. (Depending on which Lysandre you have, they could be a furry.)
Person 1: ew lysandre is being sooooooo annoying
Lysandre: 🖕
Person 2: L = Lysandre
Lysandre: 🖕
Person 2: L = Lysandre