I had never heard of that term either. Then again if it was something that came out of the late 1990s during the overproduced years I was "absent" from the hobby then it makes sense. My first thought was from the years sets of those "Crash the Game" inserts, game, sweepstakes cards.
I collect: Baseball, Football, Hockey, Mostly Vintage pre1980, My Homie teams - Washington/Baltimore Teams Senators (Twins, Rangers), Expos/Nationals, Redskins, Capitals, Bullets/Wizards - HOFers - Non-sport (mostly TV shows and movies).
My Trade List is very much a work in progress
CaptKirk42s Trading Card Blog Curly W Cards Strive For '65 YouTube klandersen42