The "AI singularity" is a point in time where computational advances have enabled a machine intelligence so powerful it has the ability to modify its own design and computational power to increase its capabilities at an exponential rate.
"Roko's Basilisk" is the idea that by virtue of its intelligence, the AI would be absolutely certain of their priority over all other goals. Thus, the AI would be incentivized to blackmail all sentient life into assisting in its creation to speed up this process.
It would do so by torturing anyone who learned of this concept and did not immediately set to work towards the singularity.
You are now aware of this idea. We apologize.