The phrase "real cutie" is an informal expression used to describe someone who is very cute or adorable. It can be applied to both children and adults, and often implies a sense of charm, attractiveness, and likability.
Sentences with «real cutie»
Give your sweetie a photograph card of tropical leaves that says «you're my person», or if you prefer there are also photograph cards that say «I like you, no like a lot» and «you're a real cutie» with a floral background which all can be printed onto white cardstock. (thespruce.com)