When a person is being bratty, childish, annoying either because he/she is not getting his/her way, is feeling tired/hungry and acts up due to one/all of those circumstances.Synonyms of necio are bratty childish immature annoying fussy Used in US as well
"He was being a necio because he wasn?t getting his way. The baby is necio/necia because he/she is hungry/tired/sick."
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