General Public

• Bee's Knees: Something excellent or outstanding
• Cat's Pajamas: Something or someone cool or stylish
• Hotsy-Totsy: Perfect, the tops
• Giggle Water: Alcoholic beverage
• Baloney: Nonsense
• Dough: Money

Working Class/Street Language

• Flat Tire: A dull or boring person
• Big Cheese: Important person, boss
• On the Lam: Running away from the police
• Speakeasy: A hidden bar selling illegal alcohol during Prohibition
• Cheaters: Eyeglasses
• Swell: A rich or socially prominent person

Youth/Flapper Culture

• Sheba/Sheik: A woman/man with sex appeal
• Bee's Knees: An extraordinary person, thing, idea; the ultimate
• Cake-Eater: A ladies' man
• Flapper: A young woman with bobbed hair and short skirts who flaunted her disdain for what was back then considered "decent" behavior
• Putting on the Ritz: Dressing fashionably
• All Wet: Mistaken or wrong

Criminal Underworld

• Gumshoe: A detective or private eye
• Bracelets: Handcuffs
• Bump Off: To murder or kill
• Pinch: To arrest
• Heater: A gun
• Yegg: A burglar or safecracker

High Society/Upper Class

• Ritzy: Elegant, posh
• Darb: An excellent person or thing (as in "the Darb" – a person with money who can be relied on to pay the check)
• Cash or Check: A question to determine if you're going to kiss now or later
• Spifflicated: Drunk
• Live Wire: A lively or energetic person