Witter is a British slang word that means to talk excessively about unimportant or trivial matters. Synonyms for this word include chatter, prattle, blather, gossip, babble, jabber, drivel, and gibberish. Each of these words conveys a similar meaning to witter, but they may have slightly different connotations depending on the context in which they are used. For example, chatter may suggest a more upbeat or friendly tone, whereas gibberish may imply that the speaker's words are nonsensical or confusing. Regardless of which synonym you choose, they all convey a sense of aimless or unnecessary talk and can be used to describe someone who talks too much.