When someone in school gets such a low score on a multiple choice test that a monkey filling in random answers would have beaten them.
Deon: What the..? I got a 12% on my biology midterm!
Poindexter: Weren't there only 4 possible answers for each question? You should have gotten a 25% even if you guessed on every single one!
Deon: How can this be? How can I know LESS than nothing?
Poindexter: Haha, you got beat by the monkey.