A person who has a strong and unusual personality, especially one with seriously unpleasant character flaws (e.g. a nasty piece of work). (This sense came about due to Hamlet’s soliloquy (see sense 1 above)).
A product or manufactured article, especially an item of art or craft.
A dislikable or contemptible person.
An informer or spy; a traitor.
To inform on; to betray.