Flappers

Bad

All wet: wrong.
Applesauce: nonsense.
Baloney: nonsense.
Banana oil: nonsense.
Bump off: to murder.
Bunk: nonsense.
Cake-eater: ladie's man
Dumb-Dora: a stupid girl.
Flat-Tire: a dull, boring person.
Frame: to cause a person's arrest by giving false evidence.
Gold digger: a woman who uses feminine charm to extract money from a man.
Gyp: to cheat.
Hard-boiled: tough.
Hokum: nonsense.Horsefeathers: nonsene.
Line: insincere flattery.
Lounge lizard: a ladie's man.
Lousy: bad.
Nerts: an interjection expressing the speakers disgust.

Good

Bee's knees: a superb person or thing.
Berries: anything wonderful.
Big cheese: an important person.
Cat's meow: anything wonderful.
Copacetic: excellent.
Darb: an excellent person or thing.
Goofy: silly.
Hep: wise.
Jake: okay.
Ritzy: elegant.
Screwy: crazy.
Spiffy: having an elegantly fashionable appearance.
Swanky: elegant.
Swell: marvelous.

Others

Belly laugh: a loud, uninhibited laugh.
Blind date: a date with an unknown person.
Bronx cheer: a loud derisive noise from an audience.
Bull session: an informal group discussion.
Bump off: to murder.
Carry a torch: to suffer from unrequited.
Cheaters: eyeglasses.
Dogs: human feet.
Gam: a girls legs.
Giggle water: a alcoholic drink.
Hoofer: chorus girl.
Hotsy-totsy: pleasing.
Sheba: a young women with sex appeal.
Shelk: a young man with sex appeal.
Struggle buggy: a car.