A guitar playing style or technique that was abandoned in the late 1980's.
The board of directors at MTV decided that learning to "shred", as it were, took too much time, patience, and work to do correctly, and thus was banned in early 1992, in favor of more lucrative cookie cutter style bands, with a higher turnover rate.
MTV Exec 1: "Aw come on. Shred is cool."
MTV Exec 2: "Yes, but look here. In the time it takes to teach one guy how to shred well, we can raise and kill off four three-chord bands, OR seventeen boy-bands!"
MTV Exec 1: "Well holy shit on rye, Steve! Who needs shred anyways?"