This is a funny experiment!
Grok says: 'If you urinate in a trash can and leave it undisturbed for more than 24-48 hours at room temperature, several chemical and biological changes occur due to the composition of urine (mostly water, urea, salts, and waste products) and exposure to air and bacteria.'
'Mixing with trash (e.g., food scraps, paper) introduces more bacteria or organic matter, speeding up fermentation. Sugars in urine or trash could convert to alcohols like ethanol, and the mixture might attract insects like flies or foster mold growth if moist enough.'
'The most noticeable change is a strong, pungent ammonia odor (like cat litter or cleaning products) that develops within hours and becomes overpowering after a day. It can permeate the surrounding area, especially in an enclosed space.'
A foid will have to clean this up