An OVERDRAMATIC ONE is someone who tends to be overly dramatic in their behavior and reactions. This term can be used to describe someone who is overly emotional, exaggerates situations, or is overly theatrical in their actions. The crossword solution for this term is HAM, which is an acronym for 'Hyperactive Actor Maniac'. This term was coined by the American playwright and actor, David Mamet, to describe someone who is overly dramatic in their acting.