General Slang:
* Groovy: Excellent, cool, fashionable. "That new Beatles song is totally groovy!"
* Far out: Amazing, incredible, mind-blowing. "The psychedelic art exhibit was far out, man!"
* Right on: An expression of agreement or approval. "Right on, brother! Peace and love!"
* Cool: Excellent, good, fashionable. "Those new bell bottoms are super cool!"
* Dig: To understand, appreciate, or like something. "I really dig your new haircut."
* Rad: Excellent, cool, amazing. "That new car is rad!"
* Heavy: Important, significant, intense. "The news about the war was heavy."
* The man: A term for authority figures, often used with negativity. "The man is trying to keep us down."
Youth Culture Slang:
* Peace out: A farewell expression, often used with a wave of the hand.
* Hang ten: A surfing term meaning to stand on the very end of the surfboard.
* Make out: To kiss or engage in other romantic activities.
* Goofy foot: A surfer who rides with their left foot forward on the surfboard.
* Drag racing: A popular activity where cars race down a straight track.
* Head shop: A store selling psychedelic art, music, and paraphernalia.
Specific to African American Slang:
* Soul: An adjective describing something authentic, passionate, and heartfelt, especially music.
* Soul Brother/Sister: A term of respect used between African Americans.
* Funky: Describing something cool, stylish, or good.
* Dig it: To understand, appreciate, or like something.
Other Words to Note:
* Mod: Short for "Modernist," referring to a style of dress and music popular in the mid-1960s, often associated with the Beatles.
* Beatnik: A person who embraced the counterculture of the 1950s, associated with bohemian lifestyles.
* Hippie: A person associated with the counterculture movement of the 1960s, known for their rejection of mainstream values and embrace of peace and love.
Remember that slang changes rapidly! These are just a few examples, and many other words were in use in 1966. To get a more nuanced understanding of the language, look up specific words or phrases you encounter.