2 years back i had appendix surgery after that i am unable to digest fatty foods and meat i vomit mostly whenever i eat.

Serious condition: This requires more or ouch evaluation. You could have a partial bowel obstruction due to previous abdominal surgery but in all likelihood, this is not directly related to the appendectomy. It sounds as of you may have a malabsorption syndrome or possible disease effecting the bile duct, pancreas or gallbladder. Discuss with your primary care physician or gastroenterologist.

Unrelated: You had an appendectomy two years ago. You cannot eat fatty foods and you vomit when eating meat. They are coincidental but most likely unrelated. Perhaps you should see your doctor for a referral to the gastroenterologist. You should record every meal what you eat and how long after eating that you vomit. Also note you weight loss.