The phrase "infantile behavior" refers to actions or attitudes that resemble those of a young child or baby. It suggests immaturity, petulance, or acting in a childish and immature way.
Sentences with «infantile behavior»
Many later problems of children are rooted in inadequacies in this first, trust - forming stage — depression, feelings of unworth, withdrawal from relationships, continued infantile behavior such as thumbsucking and overeating, for example. (religion-online.org)
Sorry little one but the only infantile behavior and delusional flatulence is emitting from you... not anyone else. (evo.co.uk)
Some experts believe that kittens taken from their mother too early show infantile behaviors like this as adults. (mnn.com)