I think “Huzzah!” as a cheer is always good.
When raising your glass for a random toast: “Gentlemen - the queen!”
As a way of referring to someone fondly: “Bless his/her cotton socks”. Awwwwwww.
An Irish-Catholic expression of suprise, often used by my nan: “Jesus wept and Mary held the bucket!”
Fran
This reminds me of that college where they compile a list to send to all of the professors concerning various attitudes and facts about the incoming freshman class. It makes points like “They have probably never seen a TV set with just 13 channels” and “They don’t remember anything about the Iran-Contra scandal.”
One of the points it makes is that “like a broken record” is probably a meaningless phrase to them because they are children of the CD era.
Jumpin’ Jehosophat!
Great Caesar’s Ghost!
That’s really nifty / swell / neatsie-coolio!
(Swell is still used, but only sarcastically, as in “Wow, that’s really swell, Dad.”)
So, did people really ever talk like that, or was it considered weird/funny back then, too?
why, i otta…
look, this thread has really queered my day, see?
time for me to spread out.
i bid you Good Day, Sir!
This thread is ace!
I love it when I get a chance to work the phrase “Hey, I’m hip to the lingo” into any conversation. Especially when conversing with teenagers.
my great aunt sally usta say ‘o my stars and garters.’
Let me just “ring through” to HQ and see if they have anything to “bring to the party”…
That’s copacetic with me!
Ahoy-hoy!
Gerdy, what a gash,
Holy Crow
What in the Sam Hill?
He staggered home drunk - three sheets to the wind.
I know I’m getting old.
I wonder if today’s youth think that “fresh!”, “awesome!” or “radical!” are anachronistic phrases along the lines of my hearing “groovy!”, or to step a generation back from there, “keen!”
Heh some of these are great.
Chronos: I looked back at the OP and there wasn’t a designated side for antiquated VS modern. I think you can figure out which is which.
When I originally posted I meant antequated as in 1930’s-1950’s (i.e. Pleasantville if anyone ever saw the movie)
Words like “rad” and “groovy” aren’t as fun because many people (at least down is SoHo) still use them.
Thanks a lot…I forgot all about nifty. 
Mercy street!
I was saying “groovy” back in the early 90s (before the whole retro thing hit). I used to get some very strange looks. (But that was the point.) Now that everything is '70s (That '70s Show, fashions, even the VW Beetle recalls the early '70s) everyone is saying “groovy”. I’ll have to find another word or phrase. That would be really outta sight! And probablt far out, right on and solid
Actually, I do say right on, but the inflection is difficult in print. Sort of an encouraging tone, accompanied by a couple of nods.
Hood. Nobody says “hood” anymore; as in, “He’s a two-bit hood.”
You’re just crying in the rain. I don’t know if this counts, but it sounds old-fashioned.
My current phrases are Son of a whore! instead of “Son of a bitch.” and Sack! as a general interjection along the lines of “Crap!”.
I may start using hep again, as I did in the '80s.
Old bean is used in greeting. “Mike, old bean! How’ve you been?”
No, no…what you SHOULD have said is, “I’m gonna eighty-six this thread!”
ya mean the gray long nightie i have on? 
how about “YEEEEEHAWWWWWW!!!”, cowboy-style?
I enjoy using many old phrases. Two of my favorites come to mind: “by gum” and “my land in heaven”.
I once heard a scottish woman tell her husband that she would “have his guts for garters” if he forgot to bring home some groceries.
Retief