A versatile noun and sometimes adjective that has nothing to do with the actress Judy Dench, but whose image is inevitable upon use of this word, making it relative to the actress and all of her qualities. Its primary use in context is as an insult and more common as the act of being a dench or dench-like. Typically dench is used to insult one person, preferably a close friend, however, make sure it is not overused in a short period of time. If said correctly, the emphasis is focused on the last few letters of the word. Since the term is an insult and comes off as one, the idea that you might be like Judy Dench while not really knowing what it means to be a Dench, makes this word one of a kind.
"Stop being such a dench..."
"You look like a denchy pirate hooker."
"....oh yeah, well you're a dench." -used as a comeback.