Someone who acts like an infant and/or is immature to a group of other people and even possibly yourself.
person1)did you dress up for Halloween this year? i dressed up as a chipmunk
person2)ew no, thats so childish Brenda
person1)well...now i know how you really feel karen..
person2)ew no, thats so childish Brenda
person1)well...now i know how you really feel karen..
by AGravePerson April 22, 2020
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