Idiom request about conversation [closed]

Is there any idiom or expression for this: To make a conversation and talk about many different and irrelevant subjects, keep changing the topics frequently and so. Thanks

Solution 1:

Such a conversation can be called "small talk." People can "make small talk" or, less common, "engage in small talk." The canonical small-talk topic is the weather, but the performance of sports teams, health and activities of family, and a wide variety of other generally inconsequential topics might come up in such a conversation.

"Small talk" is distinguished from @surlawda's family of suggestions in that his suggest actively avoiding one or more specific consequential topics, whereas small talk is more about generally keeping the topics light, so as to enjoy conversing. Small talk is for passing time without risking conflict or deep engagement.