Dammit!!! I can't find my bottle of anti-diarrhea drink!!! How am I going to get through this interview??? Oh, no, not my vitamin C pills too!!! DAMMIT!!!!!!!
A small part, usually a fastener, that rolls off your workbench and falls, ending up in the darkest, most inaccessible place it can find on the floor. Usually found by bare feet, painfully.