Chatter

Chatter may refer to:
 * Chatter (machining) or machining vibrations
 * the undesirable phenomenon of oscillations having finite frequency and amplitude, in sliding mode control
 * Chatter (contacts) or contact bounce, a common problem with mechanical switches and relays
 * Chatter (signals intelligence), the volume of communication to or from suspected terrorists or spies
 * Project CHATTER (1947–53), a U.S. Navy truth serum project
 * Chatter (software), enterprise social networking software
 * Small talk