If the above fails, or if multiple drains in the house are backing up, the clog may be in the main sewer line. Do not use caustic chemical drain cleaners (e.g., sulfuric acid) – they generate heat that can warp the toilet’s wax seal or crack the bowl.
This is often the most effective "no-plunger" solution for organic clogs. Pour about clogged toilet with poop
Let the soap sit for 10–15 minutes, then slowly pour a gallon of hot (not boiling) water from waist height. The weight of the water and the soap helps break down the waste. If the above fails, or if multiple drains