hello kiddy 

A guy who ignores a girl's texts and instead replies "hi" two days later as if nothing happened.

(text messages)
A: where do you wanna meet up later?
B: (two days later)

Hi!!!!!!!!
A: omg, stop being a hello kiddy!!

hello kiddy by Miss Cotton Candy April 14, 2016

Hello Kiddy Person 

An adult that is selfish, irritable and naive like a child.

- How was your Valentine's Day?
- Well ... There was a tantrum, popcorn and a bear movie. I realized that s/he is an Hello Kiddy Person.

Hello Kiddy Person by Juanki St. Jacob February 15, 2018