- A young child or young person.
- A term of endearment for a child or young person.
Informal word originated from early 20th century american english, child or youngster.
- The kiddo was too young to understand what was happening.
- She always called her little brother kiddo.
- He was the youngest kiddo in the class.
- The kiddo was so cute with her big brown eyes and curly hair.
- The kiddo was full of energy and always on the go.