"The sum of all fears..." - Ahlet "Rattlesnake! Rattlesnake! Rattlesnake!"
A DSP is actually a Dark Side Point. Such a point measures the character's affinity and touch with the Dark Side. This isn't necessarily a bad thing if the character has gained the points through deeds that has to be done, but a great amount of darkside points will eventually corrupt the character completly. Thus even the most loyal and altruistic Jedi can be turned into a villain by having a large pool.