Definitions

1. adjective

most characteristic of or typical of a ham, especially in being excessively sentimental or emotionally unstable

“She was known as the hammiest person in the drama club, always crying during performances.”

2. superlative form of ‘hammy’

extremely hammy or sentimental, especially in a way that is considered annoying or overdone

“The actor’s performance was criticized for being the hammiest thing he had done in years.”