Poor emotional regulation. Poor long term planning. Disregarding facts for emotions.

Lacking maturity. Literally acting like a child, despite knowing better.

Instant gratification at long-term expense

Does not include necessary things like food

Nor acts to build or sustain relationships, like making your kid happy

The inability to process their raw emotions.

When an adult hears disappointing news, they say ok, and think about how they can get a better outcome next time.

A child starts yelling and crying and hitting.

Tell a kid that there’s a pizza party later, and they’ll want a PIZZA PARTY RIGHT NOW!

Adults are able to wait until later without bouncing off the walls or whining for it to happen now.

pee pee poo poo

hehehehehe

Most people’s definition: anything fun and silly because apparently adults aren’t supposed to have fun or something

Mine: acting like someone who hasn’t learned basic knowledge or developed empathy

Behaving in an emotionally disregulated manner, similar to how a child who has not developed as a person would do

Selfish behaviour that doesn’t consider other people’s needs

To me if it’s done purely for the attention of others rather than intrinsically motivated it’s childish. A general lack of responsibility is also childish. Tamer stuff like trinket collections, lewd jokes, cartoons and whatnot in my opinion is enjoyable independently of age. If anything judging those things as childish could be seen as childish. Who’s more obsessed with seeming all grown up than kids?

It’s childish if someone bitter tells you it is

So everything is childish

Enjoy life, people

I guess when something has to be taken seriously but you make jokes and don’t understand the magnitude of the situation. Most other childish behavior is subjective & sometimes isn’t as bad of a trait as people try to make it out to be.

I think people use that word to mean immature. Childish implies that a behavior is age-inappropriate, but also implies that the behavior would be appropriate for a child, which is often not true. Immature is a better word to use when someone is doing behaviors that indicate their brain development hasn’t caught up with their life situation.

Stubbornness, shortsightedness, dramatization

In an adult, you mean?

A child is in the process of learning to behave, so I will always grant them a pass on not being able to listen and not being able to control their emotions/reaction. Not so much with any adult person, at least not with anyone who is also demanding to be considered an adult and treated like one. Being an adult is great, but it has a cost which is to stop behaving like a child ;)

I can only think of negative emotions where the feeler can’t handle them in a controlled way.
E.g. getting angry and screaming and/or hitting things.
For an adult, avoiding childish behaviour when angry would be cursing and at the most, raising ones voice.

This however does not apply to emergencies and such. There will always be room for angry screaming if the situation demands it.

Being a martyr is another example. Having something go against you and proclaiming you are a victim is childish. Grow up and own whatever happened.