To display emotion excessive for the situation.(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "overemote" in a sentence
"The young actors, some of them Korean pop stars, were directed to overemote and scream outrageously during their "Titanic" style dramatic disaster scenes, but that was fascinating too."
"Look, if I want to overemote, I'll do it myself, watching this irritatingly self-aggrandizing hooey."