"You canker blossom!" 3 Shakespearean Insults
poisonous plant (also known as monkshood and wolf's bane), 1570s, from French aconit, from Latin aconitum, from Greek akoniton, of unknown origin.
aconite ac·o·nite (āk'ə-nīt')
The dried poisonous root of various herbs of the genus Aconitum containing aconitine, used externally as an analgesic.