Son of Mary and John Winchester, younger brother of Dean Winchester. His mother was murdered by a demon when he was six months old and is father trained him and his brother Dean to become a hunter of all things Supernatural. He has certain abilities because of the demon that murdered Mary. He gets visions of things that will happen in the future, and rarely has used telekenesis.
He is twenty four years old, hates to be called Sammy, and got a full scholarship to Stanford University. He had a long term girlfriend named Jessica Moore before she was murdered by the same demon that killed his mother.
"You smell like a toilet."
"That's not school, that's schoolhouse rock!"
"Wait, there's no such thing as unicorns?"
"It's not food anymore, Dean, it's Darwinism."
"What kind of house doesn't have any salt? Low sodium freaks..."
"Dude, I'm not enabling your sick habit. You're like one of those lab rats that pushes the pleasure button instead of the food button until it dies. "