OK, I need to know -- what IS the 'L-sign'???? That passed me by.
A sign made with the thumb and forefinger at a perpendicular, with a hand pointed at someone means "loser". Lardass did it to McCain after McCains slam on him. It appeared to be more directed at the crowd than McCain.
L sign = Loser, which was directed at McCain for outing him at the convention by calling him a "disingenuous" movie producer.
See below:
It's something that eight year olds (and pampered overfed manchildren) do to call someone a "loser."