Use wide circular sweeping movements under the ear and then move towards the neck but making sure to move along the jaw. (medlicker.com)
Slowly suck up all the crumbs and dirt that have accumulated on the surface, using a slow sweeping movement. (idealhome.co.uk)
Reported in Scientific American, This Week in World War I: October 3, 1914 The opening weeks of the First World War saw sweeping movements of vast armies. (scientificamerican.com)