deodorant malfunction
Usually happens when there's not a lot of deodorant left on the stick. You're trying to put some on, you press just a little too hard, and the entire deodorant head snaps off, leaving you with nothing. This has happened to almost every guy who uses solid deodorant regularly, and is really annoying.
Dammit, I'm going to be so sweaty today, I had a deodorant malfunction this morning...