Slang term for serious users of DXM, or Dextromethorphan - a dissociative drug. Dextronauts are those who go above and beyond trip dosages or prolong them for periods of time in order to have intrinsic, ethereal experiences. They are well versed in the toxicology of the substances ingested and also clearly understand any possible side effects and outcomes.
David soon begin experimenting with higher doses, discovering ego death and adopting shamanistic beliefs to further his purpose. He had become a dextronaut.
by R0r January 28, 2010