Superheating is when a liquid is heated, but because of various factors suppressing bubble formation, the liquid does not boil, and instead continues to rise in temperature above its boiling point. The most common case of this is heating water in a microwave and it seems to not boil, and then suddenly violently boils as soon as it is disturbed.
Normally, as you put energy into water or another liquid, its temperature will rise until it reaches the boiling temperature for its current pressure. Once the liquid hits that boiling point, its temperature will stop rising, because the energy is now going into converting the liquid to a gas. Only once all the liquid has boiled off, with the substance now in its gaseous state, will its temperature start to rise again.
However, sometimes various factors can suppress bubble formation. As energy continues to be added, the temperature continues rise past the boiling point, because the liquid can't form gas bubbles, and thus consume the energy that would normally go into bubble formation. Eventually, a minor disturbance to the system pushes the energy balance in favor of bubble formation, and all that excess energy above the boiling point gets dumped into bubble formation in an extremely short period of time. The result: a previously still liquid suddenly and seemingly spontaneously boiling explosively.
That is what the situation with pajeets feels like. Monied interests are raising the temperature by trying to import infinity pajeet slaves. Various factors are working to suppress Noticing (izzat behavior to keep their parasitims hidden, the thought-terminating cliche of "racism", etc).