Preheat the oven or grill to 180 degreeS C or 350 F. Brush grill with oil to avoid sticking.
In a bowl, stir together oil, lemon juice, soy sauce, brown sugar, Worcestershire sauce, garlic, salt, and pepper.
Pierce chicken thigh with a fork all over, and place in a large Ziploc bag.
Pour marinade over the chicken, let marinate for at least 1 hour but if you have the time, let it stay longer up to 4 hours.
Place chicken on the grill and garnish with fresh parsley. Cook for approximately 10-12 minutes each side.
Remove chicken from grill and allow to rest for 10 minutes