noun
or fly amanita
: a poisonous mushroom ( Amanita muscaria ) that has a variably colored but typically bright-red pileus with a warty white scurf on the surface and a prominent bulb at the base of the stipe, that with the related death cup is responsible for most cases of severe mushroom poisoning, that has been used as a source of poison for flypaper, and that is extensively used chiefly in northeastern Asia as an intoxicant especially for the hallucinatory effects that it produces — called also fly mushroom