HI... greasy foods are on a list of foods to avoid when u have reflux.....see our Health Pages for tips and a list of foods that r safe and to avoid as well as lifestyle changes that can help u feel better too.
http://www.medhelp.org/health_pages/list?cid=236
I strongly suggest u see a GI dr to check to see if u have a PH issue or H.Pylori or a hiatal hernia. Post nasal drip can stir up reflux as well.
"selma"
I am a 35 year old male and I have the exact same problem. After eating greasy food like things sauteed in butter or pizza, I will "burp" up large quantities of pure, crystal clear, orange grease. Nothing else, just grease that looks exactly like the stuff that pools on top of a pepperoni pizza. I, however, am not a healthy weight. I weigh in around 325 and have type 2 diabetes and high blood pressure. Here is the kicker thought, My cholesterol is PERFECT. Bad is non existent and good is right where it should be. It's like my body has a filter on it and after the food has passed, the "bad" grease comes back up.
I am 37 and I have the same "problem". It takes a while longer for me, about 3 or 4 hours but I burp up clear grease after eating anything fried or greasy. BUUUTTT, I was up to 350 lbs and had my cholesterol checked and rechecked and checked again because it was perfect. The Dr told me to take antacids but this is one problem I don't particularly want to fix. If someone could figure out what is going on in our gut they could solve the #1 killer in America.
I have the same issue. I've experienced it since at least my early teens. I notice it most after eating buttery or greasy foods (popcorn, sausage, hamburgers). I'm a 27 year-old, 135lb relatively athletic/fit male.
This is likely due to Bile Reflux in combination with GERD... This may help explain... I would recommend getting a mechanical bed base and slightly elevating the torso portion. Also, I have found diluting 2 tables spoons of Mothers's Apple Cider Vinegar with 16 oz of water (drink 1/3 in morning, 1/3 in afternoon, and 1/3 in evening) helps a great deal with Acid Reflux...
https://www.mayoclinic.org/diseases-conditions/bile-reflux/symptoms-causes/syc-20370115