An imaginary line used in a game of dungeons and dragons, usually to determine whether a target can be attacked.
Chris: I'm attacking your Goblin, it's gonna go down quicker than your mum at an all you can eat sausage fest.
Matt: I've studied errata 27.8 and you don't have line of sight. You're a cheat.
Marcus: What is line of sight?
Someone with an abnormally small penis who tries to compensate by creating a big ego.
"I slept with Chris for the first time last night and it was very disappointing, he is a total yorke."