Facepalmery
The moment you hit your face with your hand because you just did something so idiotic it deserves a curse.
I tried to microwave my phone and it exploded. Facepalmery was just the beginning.
He said he was going to win the lottery, then bet all his money on a cat fighting a duck.
She tried to explain her math problem to a kid and got confused. Facepalmery for the win.