(idiomatic) Something which is initially regarded as advantageous but which is later recognized to be disadvantageous or harmful; an apparently beneficial or benign instrument or scheme for causing death or harm.

plural of poison ivy

plural of poisoned chalice

The deadly nightshade.

Resembling or characteristic of poison.

A woody shrub or small tree, all parts of which cause irritation to humans; Toxicodendron vernix, formerly Rhus vernix.

plural of poison sumac

plural of poison dart frog

(informal) Used to ask someone what alcoholic beverage they would like to drink.

Lacking poise; ungraceful.