1 definition by lucasman1111
Half circle pencil markings in the writing utensil slot on a desk. Students fill in the sides of utensil slots on desks throughout schools with their pencil, creating what is known as a milk dud. After finishing a milk dud, students will typically erase them, but in many cases they're left behind for other students to continue the milk duds, shading in the entire pencil slot.
by lucasman1111 February 10, 2011