"Libbing" is a term that could have multiple synonyms depending on the context in which it is used. One possible synonym could be "ad-libbing," which means to improvise or make up on-the-spot during a performance or speech. Another synonym for "libbing" could be "chatting" or "conversing," as the term may refer to a free-flowing conversation. In the context of politics, "libbing" could refer to advocating for liberal policies or beliefs, and a possible synonym for this usage could be "progressive." Other possible synonyms could be "jabbering," "rambling," or "yammering," which all describe talking at length or with little cohesion.