Definitions

1. noun

A nickname for a person with the surname Smith, especially in the United States.

“The kids called their neighbor Smitty because of his last name.”

2. adjective

Relating to or characteristic of the surname Smith.

“Smitty-style furniture is popular in some parts of the country.”

3. proper noun

A given name or nickname, especially one used as an informal or familiar form of address.

“The team captain was known as Smitty to his teammates.”