What is the definition of Bubkus?

Answer 1

bubkus "Bubkus" is a variation of "Bubkes" (also spelled: "Bupkis"), of Yiddish origin. It means "nothing at all", as in - 1) He was going to write a script by today, but all he has is bupkus. 2) He's worth bupkus.

Answer 2

"Bubkus" is a colloquial term originating from Yiddish that means "nothing" or "worthless." It is often used to emphasize that there is no worth or value in something.