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An old Irish term meaning good friend or Brother.
"Wats up boyo." or "Hey boyo wheres the fight."
by C-Wade November 08, 2007
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The term "boyo" is a part of "Wenglish" (Welsh-English) that has simply grown from a Welsh take on the English word "boy". Although perhaps not widely used today, it is used to address someone, not necessarily young, frequently with negative connotations.
What ya doing there, boyo? (A non-welsh person to a welsh person (both grown men)).
by Brynly Jones August 18, 2006
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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.
"Whats up Boyo, looks like your lady is cheating on you"
"Times up Boyo, think you need to get a cab home"
by John Rhino January 16, 2016
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A slang word word used by Mr. Krabs in the animated show, "Spongebob Squarepants," to reference the title character Spongebob or his pink mate Patrick.
"Don't go near those hooks me boyo."
via giphy
by Northern Southerner November 30, 2016
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A term used by boyos (at or above boyo rank) often used as a form of respect.
Boyo why did you break the great promise between boyos
by SomeBoyo November 18, 2018
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Boyo is supposed to be a Welsh saying for a friend or mate, but i've never heard anyone in Wales say it!!!

The only people i hear saying it are Enlgish people trying to take the piss!

Ususally putting on a really bad accent, that sounds more Indian in origin than Welsh!
English guy: All right boyo?

Welshman: Yeah fine, err, why are you putting on that Indian accent?
by Tom........ March 28, 2007
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another word for a male friend; a bastardization of boy.
Me: Hey, BOYO, what the haps, man?
Friend: Nada, absolutely nada.
by Cherie Nelson May 23, 2005
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