A verbal exclamation used when a large (and often clumsy) mistake has been made, such as dropping a wine glass on the floor, backing your car into a telephone pole, or forgetting a girlfriend's birthday.

Can also be used in an noun sense, as an affectionate name for a clumsy friend.

The phrase is intended as a suitable, non-vulgar replacement for the more commonly-used exclamations in this context (eg, "Son of a bitch!", "Fuck!", etc).

the art of remembering an arousing occurrence or some porn you watched while masturbating, often handy if you have no porn or your in the shower