Basically just
infinite regress, but sounds much
cooler.
Could also be differentiated from infinite regress by its specific reference to self-reference.
To paraphrase an example given by Robert Anton Wilson, in order to understand sociology, we must understand the influence that society has on the way that we are looking at sociology, which we can call sociosociology. This then requires sociosociosociology, and so on...
This kind of catastrophe can cause big problems in thinking and models thereof. See my brain exploding.