Another word for semen, named after the opaque, viscous, orange scented school cleaning product. It is stored in jugs that have pumps that are used by students to spray all over surfaces in a humorous manner. Teachers and faculty are almost always unaware of the innuendo taking place.
Student 1; "Hey can I spray the Gojo?"
Student 2; "Oh man, I've got Gojo on my hands. Where's the Gojo rag?"