Possible Clues:

• Poisonous, as chemicals
• Poisonous beef consumed in short moment
• Like azaleas, to cats and dogs
• Extreme opposite of ''nutritious''
• Like cyanide
• Very unhealthy
• Very unpleasant and provocative
• Penniless subject admitting vote is harmful
• Like sulfur dioxide or carbon monoxide
• Concise Oxford coming in to name mainly retro word describing bad things