boomerangst n
a morbid feeling of anxiety, apprehension, or insecurity that one is unaccountably about get whacked in the side of the head by a bent or angular throwing club typically flat on one side and rounded on the other so that it soars or curves in flight;
a fully justified feeling of anxiety, apprehension, or insecurity about the future of Social Security common to members of the generation born in the United States during the years immediately after the second world war