In a large bowl, combine pineapple, lemon, lime juices; add vinegar, garlic, salt, pepper, oregano, cayenne and jalapeno peppers.
Place chicken in the bowl and place in the refrigerator. Let stand for 24 hours.
When ready to grill, heat your grill to around 300 degrees, and cook for about 10-15 minutes, until 165 F internal temperature.
Times will vary depending on the type of chicken meat you are using. Enjoy!