I am not very fat but there is accumulated fat in my throat area which looks bad. is there any exercise to reduce fat in throat area?

No: We humans cannot choose where we want our fat to be, except that people who eat lots of sugar or carbs tend to get more tummy fat. Losing weight all over the body will also decrease neck fat in the throat area. One should also see his primary care doctor, who can examine the throat/neck fat to make sure there is not a hormonal problem, such as a cortisol or thyroid imbalance.