Bub..

Concise explanation: The slang term “bub” is often used as a familiar or affectionate way to address someone, similar to “buddy” or “friend.”

More information: “Bub” is a term that originates from Australian English but is also used in various other English-speaking countries. It is commonly used as a colloquial term of endearment or to refer to a person in a casual, friendly manner.

Examples:
1. “Hey, bub, how’s it going?”
2. “I’ll catch you later, bub.”