When somebody has been/is being hansened, that means that they have died and people who were never close to them when they were alive lie about being close to them when they were alive. Most of the time, the reason for people hansening is to gain popularity or becoming close to the said dead person's family or friends.
Person 1: Yo, dude, did you hear about that guy who got hansened?
Person 2: You mean Connor Murphy?
Person 1: Yeah dude, I heard that he got hansened pretty badly!