In a mixing bowl whisk together the hot sauce, Worcestershire sauce, white vinegar, minced onion, minced garlic, olive oil, and brown sugar until the sugar is mostly dissolved and the marinade is uniform.
Place the chicken tenders in a resealable bag or shallow dish and pour the marinade over them, ensuring all pieces are coated.
Refrigerate the chicken in the marinade for at least 4 hours, or up to overnight for more flavor.
Preheat the grill or grill pan to medium-high heat and lightly oil the grates or pan.
Remove the chicken from the marinade and let excess drip off; discard the used marinade.
Grill the tenders about 4 minutes per side, or until cooked through and internal temperature reaches 165°F (74°C).
Transfer to a plate and let rest a few minutes before serving.