A well-hyped term of the 16-bit generation that actually did refer to a real technique, but was overblown by marketeers at Sega Corp, to become know as "Blast Processing".
The technique simply refers to the Genesis's ability to do very fast DMA transfers, most especially during the vertical refresh, which allowed the system to "blast" memory to the screen. This was notably used on the Sonic games, which gave them the ability to have much faster horizontal movement than would otherwise be possible.
Guy 1 : Blast processing?
Guy 2 : This is what happens when the marketing department talks to the programming department.