Science fiction writers often use the term 'rip' in the fabric of spacetime to provide a means of either time travel or instantaneous travel from one corner of the universe to another. But I've also read and heard bonafide physicists use this term as well, so I suspect there is some credence to its meaning in standard physics principles and the mathematics that model them.
I understand that gravity is just the curvature of space time and that immense gravitational fields such as those near a black hole can cause extreme warping , but at what point do we consider spacetime ripping? Is this the point at which some singularity occurs in the field equations? And if so what's happening physically?