The word "most yakkity" refers to someone who talks incessantly or is overly chatty. There are several synonyms for this word, including loquacious, verbose, talkative, garrulous, and voluble. These words all describe someone who talks a lot or is prone to rambling. Additionally, other synonyms such as chatty, gabby, and blabbermouth can also be used to describe someone who is excessively talkative. While these words may have slightly different nuances, they all communicate the same idea - that someone is talkative to an extent that is noticeable and possibly even annoying to others.