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1. bucko
Slang term for a male acquaintance, used in a mock aggressive or openly hostile way.
Next time, Bucko, leave some toilet paper within arms reach when you've used up the roll.
by harry flashman Jul 25, 2003 add a video
2. bucko
A generic nickname used when reffering either to a friend or a jerk, depending on the context and the tone of voice. Often times is also used when acting like a pirate in a clever or mocking manner.
You better watch it bucko!

Hey bucko, where you been?

Arr me bucko i've got meself some fine booty.
3. bucko
A nickname or term similar to "buddy." Coined in Bakersfield, California after musician Buck Owens, who often performed at the Crystal Palace Saloon.
"Get it right, bucko!"
4. Bucko
Another word for Awesome, or cool, or tits, or basically anything positive.
Werewolf: Bucko Belated Birthday Beth!
5. Bucko
A pimp
pimpin them hoez bucko
6. Bucko
An unwanted substitute at a Sunday league football match
"Oi Bucko can you move away from the sideline, i dont want the other team to think we are actually going to bring you on"
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