1920s: Slangs

Terms referring to people:
* Flapper: Outspoken young woman with boyish manners and dress. Flappers actually modeled their style based on the look of French prostitutes; the companions of many a lonely American soldier (or "doughboy") during World War I.
* Sheik: A sexy young man; often the boyfriend of the flapper. A sheik's girlfriend might also be called a Sheba. Term inspired by sexy movie star Rudolph Valentino, famous for playing sheiks in films.
* Jazz babies: Another term for flappers
* Beaut: A cute flapper
* Joe College: Male college student
* Joe Zilch: A loser
* Jazzbo, jellybean: More terms for hip, hot young males
* Gold-digger: Flapper on the make for a rich boyfriend or husband
* Cat's Meow, Cat's Pajamas: "He's the cat's meow;" means "he's cute," "she's cute (or wonderful)," etc. Could also refer to things.
* Bee's knees: Same as "cat's meow."
* Two-timer (or) Ex: Terms referring to cheating and rejected suitors
* Petter, heavy necker, heavy petter, snugglepup: Amorous, frisky young guys
* Playboy, sugar daddy, big cheese: Financially well-to-do men, often with reputations for being generous in spending for gifts. A good catch for a gold-digger.
* Dumb Dora, dumbell: Stupid girl; airhead

Dating terms
* Hickie: Red mark left on girlfriend's neck by heavy petting boy
* Park: Verb meaning to stop at lover's lane, etc. and make love
* Carry a torch: A jilted lover's inability to let go of a former relationship
* Blind date: Date between a boy and girl who'd never met before; usually arranged by friends
* Petting, necking, heavy petting, etc.: Making love, making out; usually meant kissing and "feeling up" more than actually "going all the way."
* Stuck on: Attached; in love. Those two are "stuck on" each other.

Prohibition/Drinking terms:
* Speakeasy, gin mill, whoopee parlor: Secret, illegal bars
* Fried, crocked, ossified, juiced, etc.: Among the many terms for being drunk
* Moonshine, sauce, giggle water, hooch, bathtub gin, Jake-leg, etc. : Among the many terms for bootleg liquor
* Hair of the dog: A shot of alcohol
* Upchuck: Vomit, puke
* Rumrunner: Someone who smuggled good (not bootleg) alcoholic beverages into the United States

General Slang terms:
* Copacetic: An exclamation meaning great, excellent, cool, I understand, I dig that, etc.
* Bunk (or) baloney: Exclamations meaning it's b.s., it's not true, that's nonsense, it's a lotta hooey, it's a scam
* Banana oil: Same as bunk
* Absolutely, Positively, Posi-lootly: Exclamations meaning yes, of course, you bet; used by flappers and usually said slowly to accentuate each syllable
* Nifty, swell: Cool, excellent, that's great
* Ritzy, swanky: High class, cool
* Peppy: Full of energy, giddy
* It: Sex appeal
* Goofy: Something or someone stupid. Can also mean in love. "He's goofy for her." Also, a goof is a goofy/silly person.
* Whoopee: Makin' whoopee meant heavy petting or having sex. Whoopee also just meant have fun in general, getting drunk, partying, etc.
* Fly a Kite! (or) Go fly a kite!: Shut up, get away from me, get out of my face, go to Hell, jump off a bridge, etc.
* For crying out loud!: Something outrageous, stupid, unbelievable.
* Hard-boiled: Someone, usually a guy, with cold manners, not sentimental, a hard case.
* Hot diggety! Hot diggety dog!: Expression of excitement; or an emergency situation (Hot diggety! I gotta get going!)
* Get Hot!: Dance floor, party expression. Used to encourage dancers to perform a wild Charleston dance.