The phrase "slow poison" refers to something harmful that may not have immediate or obvious effects, but gradually causes damage or harm over time. Full definition
The above chart is based on the Department of Revenue estimates as provided in the two charts in the State July 30, 2017 Report to the Supreme Court — adapted with the changes calculated in the Fast and Slow Poison Pill sections of this report. (coalitiontoprotectourpublicschools.org)
• Introduced environment - friendly pesticides which reduced slow poisoning through regular consumption. (coverlettersandresume.com)
The food additive «MSG» is a slow poison which hides behind dozens of names, such as natural flavouring and yeast extract. (eluxemagazine.com)