"pal", "jive", "scoundrel", "dame", and "broad"
Apart from "pal" and "scoundrel", I've never heard those terms used in real life. Few people say things like "jive" and "Dames", because just saying those words makes you feel like you're trying to be a hardboiled detective in a film-noir setting. For maximum effect, wear a hat, long coat, sit in a chair with your legs up, with the blinds slanted at an angle.
I don't really use "old fashioned speak" - but I do use "brit-speak". I say "Quite so" and "very well" and "hmmm, Indeed" as well as, "do carry on". My favorite must be, "BY JOVE!". Occasionally I'll use prospector speak, such as "Dagnamit" and "Consarnit".