(1) A term used in computer programming to describe when a program fails. The program then dumps a core, which, in the ancient days of programming, poor code monkeys had to go through to see what was wrong.
(2) A term used by anyone familiar with definition (1) to mean a loss of memory.
> Segmentation Fault (Core Dumped)
It's the middle of the big exam, and everything rides on the knowledge the test-taker has known for a long time. They're prepared to take the test when suddenly:
"*(*#%#(*&%!!!! MY BRAIN JUST CORE DUMPED!"
And that's a core dump. There goes any chance of a good grade.