Immaturely adv. : In an immature manner.

Example:
Why do the Greek gods and goddesses act Immaturely and immorally at time?

Taxonomy
how to, insults, joke, relationships, family, friendships, resolving conflicts.

Defination from the web:
immaturely when someone insults you. When someone throws an insult at you, oftentimes your first instinct is to throw one right back...