1 definition by Chris Clack
Clack means to speak (about unimportant matters) rapidly and incessantly, originally from when Clacks' in England got their names for being royal court messengers. There is another version, of course, and that is it comes from the middle english work clakken, which comes from the Old Norse word Klaka which means thoughtless, prolonged talk...
by Chris Clack November 23, 2006