It is really hard to just sit there and listen as well as not be able to get a word in edge wise but you could say excuse me and then say what you want to say or say excuse me… and leave the situation politely. Sometimes wafflers don't know they are doing it as it is just nervous rambling or they do because they want to control the conversation and don 't really care what you have to say as they think there's is more important. There are times however, that this could be an important person talking and you just have to sit there and listen. (MORE)