I like to learn about words from around the world and use them in my speech. I have a particular love for British words. I just love words like spiv, nod, wasteman, barmy, slapper, bruv, lezza, shafted, nonce, junkie, bint, smackhead, nutter, slag, breve, chav, squiffy, slaphead, looney/loon, bender, and dosh.
https://www.goodreads.com/book/show/855189.The_Meaning_of_Tingo_and_Other_Extraordinary_Words_from_around_the_World
You might enjoy this book. It’s like dictionary of random slang words from around the world, with different chapters based on categories.
Personally, I was a little disappointed because 99% of the definitions are just one sentence or sentence fragment. I was hoping to find out a little more about the origins of more of the words and maybe a little of the culture behind them.