adjective

excessively theatrical or dramatic in character or style.

a histrionic outburst

melodramatic,theatrical,affected,dramatic,exaggerated,actorly,actressy,stagy,showy,artificial,overacted,overdone,unnatural,mannered,stilted,unreal,hammy,ham,camp

noun

melodramatic behaviour designed to attract attention.

by now, Anna was accustomed to her mother’s histrionics

dramatics,drama,theatrics,theatricality,tantrums,affectation,staginess,artificiality,unnaturalness