Meaning of Mad Dog: A nickname for someone who is unpredictable, aggressive, or fierce in demeanor.
Literal Meaning of Mad Dog: Literally, Mad Dog refers to the behavior of a ferocious or rabid dog.
Popularity: Low.
Origin: English (from the characterization of a fierce or unpredictable person).
Example:
Emily: Jack’s intensity on the field can be intimidating.
Liam: That’s why we call him Mad Dog.
Emily: He’s relentless when he’s competing.
Related Nicknames: Wild Dog, Beast, Maverick, Firebrand, Intense.