毒草

dúcǎo
  1. (politics, chiefly during the Cultural Revolution, dated) harmful speech; harmful writing
  2. harmful speech; harmful writing
  3. poisonous plant

Wiktionary

Entry Composition

=1 毒 dú
  1. poison
  2. to poison
  3. poisonous
  4. malicious
  5. cruel
  6. fierce
  7. narcotics
=1 毒 dài only used in 毒冒, an alternative form of 玳瑁 (dàimào)
=2 草 cǎo variant of 草 cǎo
=2 草 cǎo
  1. grass
  2. straw
  3. manuscript
  4. draft (of a document)
  5. careless
  6. rough

classifiers: 棵, 撮, 株, 根
=2 草 cào variant of 肏 cào