eraser worm
The little curls of eraser debris that litter the writing surface after a bout of erasing. So called because they resemble tiny worms.
Student: Teacher, can I switch desks? This one is covered with eraser worms!
Teacher: No, but you can clean it.
Student: How?
Teacher: Find a way.
Teacher: No, but you can clean it.
Student: How?
Teacher: Find a way.