Nautical

Son of a gun is a mild exclamation of surprise or annoyance, or a jocular, half-affectionate term for a man or rogue.

Elegant, luxurious, or characteristically upper-class in a stylish and sometimes ostentatious way; smart, fashionable and expensive-seeming.

The very last moment of a difficult or unpleasant process, reached by continuing stubbornly until nothing whatever remains to be done.

On the whole or generally speaking; taking everything into account, a statement that is broadly true even if not correct in every detail.