SUSI is a term created in Norway originated by a group of yuths in Fredrikstad , the word went from one person to another thats how it became popular. The term means look at your clothes like they look nice hella drippy.
Sosie is confident and very full of herself. She doesn't let her interesting name stop her though. If your on her good side, she will treat you like a queen. If your on her bad side well good luck getting through high school.