Bucko

A nickname for anyone whose name you do not know. Typically someone who doesn’t hold much importance to you.

Ella: what’s that 7th graders name again?
Evelyn: Bucko

bucko

Bucko is a slang similar to "bro," "man," or "homie" that is used as a name for a male.

"sup, Bucko, what are you doing today?"