Krappa is the nickname for Kappa Kappa Gamma/Krappa Krappa GRAMMA (sniff & snort partners) sorority. Krappas are usually fugly, rude braggarts about being ‘the best’ sorority. They’ve nouveau riche/new money, mean girls who are known to haze, I. e. Kappa Kappa Spanka. Combined with a terrible sisterhood, and an unwarranted snobby attitude with delusions of grandeur.
Krappa hates Pi Phi and Theta because Kappa Aloha Theta and Pi Beta Phi are top-tier sororities! Krappa is jealous and disses them all the time, Krappas are wannabes for popularity, so they are loose but still look like a goose.