Your co-worker in the next cube is at it again — yakking it up nonstop, clipping her nails, popping her gum and sucking up to the boss. Normally, you just grin and bear it, but today is different because it is National Slap Your Annoying Coworker Day. This annual event takes place every October 23 — so if someone at work is bugging you, don’t be shy — take advantage.