• (p. pr. & vb. n.) of Chatter • (n.) The act or habit of talking idly or rapidly, or of making inarticulate sounds; the sounds so made; noise made by the collision of the teeth; chatter. Found on http://thinkexist.com/dictionary/meaning/chattering/
Chat'ter·ing noun The act or habit of talking idly or rapidly, or of making inarticulate sounds; the sounds so made; noise made by the collision of the teeth; chatter. Found on http://www.encyclo.co.uk/webster/C/58
Also, called juddering. A surface irregularity caused by vibration which can occur during turning. It is caused by anyone of various factors including blunt turning tools, coarsely grogged clay, and holding turning tools loosely. Found on https://ashbrook-ceramics.co.uk/pottery-glossary/