Boyo is a word used to describe your mates, similar to pals or fellas.
It is often used to
take the piss and when the end of the word is more
exaggerated eg "boYO" it can show a sense of dominance from the person speaking the word.
"Boyo" has evolved into a cult following in South Africa as it can be seen as a satirical word, mocking the lives of rich young white
South Africans who feel entitled.
This word is legendary and will always be a part of Urban slang.