I definitely recall hearing the term super black as distinct from rich black to refer to just a mixture of black and cyan, but I can’t find a cite for that. May have been local to a specific printer? This was in a context where avoiding using four inks was an important cost saving, so maybe it was just a two color equivalent of rich black.

Of course, those two colors were also immortalized by John Cougar Mellencamp in his “little ditty ‘bout black and cyan...”