- The definition of kiddo is a nickname or pet name often used for children.
A cute nickname for your child is an example of kiddo.
A group of cute kiddos
Informal a term of affectionate address: sometimes mildly patronizing
nounpl. kid·dos Slang
- a. A child.b. A young person.
- Pal. Used as a term of familiar address: “I said to the girl, rather snootily: ‘I have a trade, kiddo. I'm a detective’” (Ross Macdonald).