SSCH is an acronym meaning "so sad...crying here." It is often used to describe one's feelings after watching a sad film, listening to Elliott Smith, or attending their grandmother's funeral. It originated from a comment on a Taylor Swift video in which a woman commented, "So sad...crying here."
Jacob: I went to Zorba's last night and I got bummed out because my bro Syc wasn't there.
Kyrstin: SSCH, babe. You'll be okay...pussy.