Immature and irresponsible actions between a pair of "less than grown up" lovebirds which results in da girl's soon having to start "eating for two".
In da infamous "Mary Jane" parody of da classic "hill-climbing duo" kiddie-poem, da fact dat "silly Jill forgot her pill" caused her delightful encounter wif her male companion to become downright "childish behavior"!
by QuacksO February 8, 2023
Get the childish behaviormug. Holding in all of the aggravating, stupid, child-like statements inside of your head until you feel it is the right time to let them out.
Mature person: “So what made you decide to act in such a childish way today?”
Childish person: “ I have held it in and waited, but now that I know you feel better I am returning to my childish ways”
Mature person: “Oh, well I am not surprised”
Childish person: “ I have held it in and waited, but now that I know you feel better I am returning to my childish ways”
Mature person: “Oh, well I am not surprised”
by Brynn33 July 29, 2021
Get the Childishmug. by announomousenr.#2 October 8, 2019
Get the childishmug. Something high school boys will cal you if you wont suck their tiny dicks , or if you wont lie for them or do what they want you to do
by HELLAJEEN November 28, 2023
Get the childishmug. 
Like a 3 year old.
Not being okay with some spoiled rotten mollycoddle trying to walk over somebody isn't a childish thing to get angry about, it's a legitimate thing to get angry about and stay angry about, especially when the one that got angry knows the mollycoddle takes nothing seriously and holds nothing sacred, and lies about everything and has told the one they got angry they needed to wake up and fight.
by The Original Agahnim January 5, 2022
Get the Childishmug. This brave, together, grown, and magic alpha heterosexual guy/girl is threatening to knock my dysfunctional childish faggot coward omega lights out if I get closer than 6 feet from him/her with no mask on.
by The Original Agahnim October 19, 2021
Get the Childishmug.