downplayer

Noun

1. One who, or that which, downplays.
   • So much for the claim of radiation downplayers about the absolute risk method. - 1983, John W. Gofman, Radiation and human health:
   • Downplayers, like weaselers, innuendo, loaded questions, and other slanters, can be used intentionally to make something less significant or worthy than it is. In other situations their use adds spark and perhaps a bit...