When someone, takes an electronic product, then jizzes in/on it to improve it's "semi-conductance" capabilites: in homage to the great south korean corporation, who initiated this practice.
Jin: "Dude, I just gave your laptop a Samsung upgrade!"
Someone socially upgrades when after being single, especially for a long time, gets involved in a serious relationship or marries. They stop hanging with the old crew because they now spend time with other couples only.
Keep in mind, this is a broad term that encompasses anyone from the guy who you used to chill with A LOT and now you don't see AT ALL, to someone you still chill with, but they treat you differently because they're with someone and you're not.
Carl: guys, what happened to John? We never see him anymore!
Paul: he socially upgraded. He and his wife only do dinners with other married couples now!
Carl: yeah, we def won't be seeing much of him anymore..