multiple gerb
a sheet of paper, chewed into tiny sections, covered with spit and shaped into a ball, which when thrown forcefully against a flat surface such as a teacher's blackboard completely covers the surface with myriad tiny saliva-drenched paper pieces.
When Brother Martin stepped out of the catechism classroom to take a call, which he did every class period, Ricky spit out onto his hand the multiple gerb he had been nursing and hurled it against the big dry erase board. The tiny spittle covered pieces instantly splattered across the board and around its edges. The splatter of white against white wasn't noticed until having dried thoroughly over the weekend.