Peanut Shrimp is a type of food made in the Thai Food Factory.
When Bart and Principal Skinner were having a fight (Bart with a peanut, Skinner with a shrimp, which their enemy was allergic to) they entered the factory and fought on a bridge above the vat. The bridge broke and they both plunged into the vat, having an allergic reaction. Bart then tells Skinner that he was El Barto causing Skinner to scream "Noooooo!".