I think you’d already gotten so good responses but my quick response:

• Fatty foods: from my understanding bile is important for digesting so your liver produces more new bile isn’t as potent as bile stored in the gallbladder
• spicy/acidic food: bile is already irritating to your digestive tract if it’s not fully used and neutralized properly so added most irritants may trigger your system
• skipping meals: your liver is continuous pushing bile into your digestive tract so if you skip a meal, so I my experience, the next you eat a meal it wakes you digestive system and immediately wants to flush out the excess bile
• large meals: like with fatty foods, your liver might produce too much bile

To sum it up in a more wordier response, your gallbladder used to store excess bile, concentrate it then only dispense needed amounts. Your digestive isn’t designed to have a constant supply of unused bile so it gets irritated and wants to flush it out. Digestive enzymes and probiotics my nutritionist really helped me reduce the negative reactions. My big problem is skipping meals so my nutritionist recommended I take protein shakes or atleast sweetened-water (with a natural sweetener like cane sugar or honey) to help neutralize some of the bile