Slang throughout the decades!

1920s

1. 23 skiddoo -- to get going; move along; leave; or scram
2. The cat's pajamas -- the best; the height of excellence
3. Gams -- legs
4. The real McCoy -- sincere; genuine; the real thing
5. Hotsy-totsy -- perfect
6. Moll -- a female companion of a gangster
7. Speakeasy -- a place where alcohol was illegally sold and drunk during Prohibition
8. The bee's knees -- excellent; outstanding
1930s

9. I'll be a monkey's uncle -- sign of disbelief; I don't believe it!
10. Gig -- a job
11. Girl Friday -- a secretary or female assistant
12. Juke joint -- a casual and inexpensive establishment with drinking, dancing, and blues music, typically in the southeastern United States
13. Skivvies -- men's underwear

1940s

14. Blockbuster -- a huge success
15. Keeping up with the Joneses -- competing to have a lifestyle or socioeconomic status comparable to one's neighbors
16. Cool -- excellent; clever; sophisticated; fashionable; or enjoyable
17. Sitting in the hot seat -- in a highly uncomfortable or embarrassing situation
18. Smooch -- kiss

1950s

19. Big brother is watching you -- someone of authority is monitoring your actions
20. Boo-boo -- a mistake; a wound
21. Hi-fi -- high fidelity; a record player or turntable
22. Hipster -- an innovative and trendy person

1960s

23. Daddy-o -- a man; used to address a hipster or beatnik
24. Groovy -- cool; hip; excellent
25. Hippie -- derived from hipster; a young adult who rebelled against established institutions, criticized middle-class values, opposed the Vietnam War, and promoted sexual freedom
26. The Man -- a person of authority; a group in power

1970s

27. Catch you on the flip side -- see you later
28. Dig it -- to like or understand something
29. Get down/Boogie -- dance
30. Mind-blowing -- unbelievable; originally an expression for the effects of hallucinogenic drugs
31. Pump iron -- lift weights
32. Workaholic -- a person who works too much or is addicted to his or her job

1980s

33. Bodacious -- beautiful
34. Chillin' -- relaxing
35. Dweeb -- a nerd; someone who is not cool
36. Fly -- cool; very hip
37. Gag me with a spoon -- disgusting
38. Gnarly -- exceptional; very cool
39. Preppy -- one who dresses in designer clothing and has a neat, clean-cut appearance
40. Wicked -- excellent; great
41. Yuppie -- Young Urban Professional; a college-educated person with a well-paying job who lives near a big city; often associated with a materialistic and superficial personality

1990s

42. Diss -- show disrespect
43. Get jiggy -- dance; flirt
44. Homey/Homeboy -- a friend or buddy
45. My bad -- my mistake
46. Phat -- cool or hip; highly attractive; hot
47. Wassup? -- What's up?; How are you?
48. Word -- yes; I agree

2000s

49. Barney Bag -- a gigantic purse
50. Newbie -- a newcomer; someone who is inexperienced
51. Peeps -- friends; people
52. Rents -- parents
53. Sweet -- beyond cool