on-pressing
adj1
Of a group, crowd, army, etc., pressing forwards.
- At the threshold he paused for an instant, and, lifting the struggling Arab above his head, hurled him, as though from a catapult, full in the faces of his on-pressing fellows.1913, Edgar Rice Burroughs, The Return of Tarzan, New York: Ballantine Books, published 1963, page 62: