I've heard that some older folks down this way wash chicken, but I never have unless I accidentally drop a piece on the floor before cooking. The FDA strongly recommends against the practice of washing meat, especially chicken, for fear of spreading bacteria around food prep surfaces.
I may rinse chicken, but after I'm done trimming and cleaning the raw bird, I am SCRUPULOUS about cleaning and sanitizing all bowls, plates, utensils, and my work area. If I'm grilling marinated chicken, I'll spoon some of the marinade on ONCE - when I first put the chicken on the grill - and then discard the rest as potentially unsafe.
I also rinse corned beef before cooking - a lot of "yucky stuff" always seems to come off the exterior. I'll usually wash some fruits and veggies (apples, bell peppers) with soap & water before eating, and I always rinse salad greens, including the "triple washed ready to eat" type like spring mix.
I've never felt the need to wash raw meat with vinegar or anything else to kill bacteria - I figure the heat of cooking will kill whatever's on the outside, and hopefully - aside from hamburger - no bacteria has found its way
inside the meat.