You folks are a bunch of weirdos. I’ll have no truck with you!
Hey, let’s not get personal here.
But to contribute, I recall my grandmother (born 1900) using the phrase “man on the moon” to describe the epitome of ignorance, as in: “He no more knows how to run a business than the man on the moon.”
And I was surprised when I heard my brother-in-law, a native Texan, call someone a peckerhead. I had never heard anyone say this with a straight face before. But I guess that’s more of a redneck-ism than an antiquity.
I think I must have missed a few pages of the thread somewhere. Here’s a few of my favorites that I use all of the time.
And, yes, I do get strange looks …
Golly Gee Whillikers
As in, “wow!”
Fritterpated
As in frazzled.
Me bucko
Informal term of address.
Kabloona
Derisive term from a WC Fields movie.
[Well baloney, Mahoney, Malarkey, you big Kabloona!]
Dang nab it!
Mild oath
Va va voom
Verbal substitute for a wolf whistle.
Neatarino
Replaced by, “cool!”
Verschluginer
From MAD Magazine. Old Yiddish idiom. Mild oath.
Left handed catawumpus
Vague descriptor.
Febelvetzer
Another MAD magazine inarticulate noun.
See you in the funny papers
Informal goodbye.
Tommyrot!
Bringlish for “garbage!”
Horseradish!
Slang for “garbage!”
Horsefeathers!
Slang for “garbage!”
Horse Hockey!
Slang for “garbage!”
Bull Hockey!
Slang for “garbage!”
Malarkey!
Slang for “garbage!”
Bull’s pizzle!
Derisive Shakespearean comment.
A mare’s nest
Legendary yet elusive item.
Hen’s Teeth
Legendary yet elusive item.
Here’s your hat, what’s your hurry?
Derisive goodbye.
Heaven the thought
(Used in conjunction with “Perish Forbid!”)
Stylin’
Departing
Rainlocker
Canuck for the shower stall.
What a duck!
Derisive term for a lamewad.
Hot Dang Dilly!
Emphatic exclamation.
Shuckey Darn!
Emphatic exclamation.
What a wahoo!
A yokel.
Yokel
See wahoo.
Smart as a whip
Praise.
Silly goose!
Mild insult.
Dunderhead
Dolt
Christmas List
Roster of enemies.
Holy Moses!
Mild oath.
Whosit
Inarticulate noun
Whatsit
Inarticulate noun
Whatchamacallit
Inarticulate noun
Thingummie
Inarticulate noun
Thingumajig
Inarticulate noun
Thingamabob
Inarticulate noun
Humma ding ding
Inarticulate noun
Homina homina
Inarticulate stammer (Ralph Kramden)
The dog’s bark
Superlative
Pull up a chair and sit on the floor.
Informal welcome.
Sit down and make yourself homely.
Informal welcome.
Ver gingle dingin’!
My own inarticulate expletive.
I’ll think of some more later.
Finagle
To inveigle
Ratso!
Mild oath
Mouse nuts
Anything truly minor.
Clear as mud
Something non-obvious.
Blast!
mild oath
Sozzled
Sodden or drunk
Shoes are too tight
Describing an irritable person
Hoo hah
Outcry or shrugging off of something
Brou-hah-hah
Imbroglio
To beat the band
Superlative
Headed south for the winter
Out of commission or departed
On the Fritz
Inoperative
On the blink
Inoperative
Crusin’ for a brusin’
Asking for trouble
Bling blanged!
Mild oath
Poppycock!
Bringlish for ‘garbage!’
…and the horse you rode in on.
peckerhead is the only word I have every heard used both by white people to criticize other white people and by black people to criticize white people. And I mean in a nasty way. I’ve never head a white person call another person a cracker in a nasty way. And I’ve never heard a white person call another white person ofay.
Has anyone noticed that the current vogue for Snoop-styel shizzle nizzle is, in addition to being a new element in the ageless tradition of nonsense, a lot like Tin Pan Alley nonsense and the later work of Ish Kabibble, such as “Mairzy Doats”?
I’m fond of both ’ You’re the cat’s pajamas’ and ‘You’re the bees knees’.
I was recently exposed to " too cool for school " and I find that to be acceptable. 
Cartooniverse
My brother and I call each other “cracker” all the time.
I used to call my black students “cracker” just to make them laugh. “Now LaQuandra, stop being a cracker.” Worked like a charm. Student can’t stay angry with you while laughing.
Ooh, and I like “right as rain”.