General:
* The cat's meow: Something excellent or stylish.
* The bee's knees: Similar to "the cat's meow," expressing great enthusiasm.
* The real McCoy: The genuine article, authentic.
* The whole shebang: Everything, the complete package.
* A swell time: A very enjoyable time.
* A flapper: A young, stylish woman who defied traditional norms, embracing short skirts, bobbed hair, and a carefree attitude.
* A sheik: A handsome and charming man.
* A sap: A naive or foolish person.
* A goon: A gangster or thug.
* A broad: A woman (sometimes derogatory).
* A dame: A woman, usually attractive.
* A mob: A group of people, often associated with criminal activity.
* To jazz something up: To make something more exciting or lively.
Money and Spending:
* Dough: Money.
* To make a bundle: To make a lot of money.
* To go broke: To lose all one's money.
* To blow it: To spend money recklessly.
Drinking and Partying:
* To knock one back: To drink an alcoholic beverage.
* To get blotto: To become drunk.
* A speakeasy: A secret bar operating during Prohibition.
* To cut a rug: To dance.
* A shindig: A party.
* To make whoopee: To have fun and party.
Other:
* To get the lowdown: To get the inside information.
* To put the kibosh on something: To stop something.
* To get the jitters: To become nervous or anxious.
* To get the blues: To feel sad or depressed.
* A hot mama: An attractive woman.
* To be in the soup: To be in trouble.
* To be a square: To be old-fashioned or boring.
* A wise guy: Someone who is sarcastic or disrespectful.
These are just a few of the many slang words that were popular in the 1920s. If you're interested in learning more about the language of this era, you can check out books and articles on the subject.
Remember that slang terms can change meaning over time, so it's important to be aware of their historical context when using them.