The Jargon File (version 4.4.7, 29 Dec 2003):
polygon pusher n. A chip designer who spends most of his or her time at the physical layout level (which requires drawing lots of multi-colored polygons). Also rectangle slinger.The Free On-line Dictionary of Computing (30 December 2018):
polygon pusher rectangle slinger (Or "rectangle slinger"). A chip designer who spends most of his or her time at the physical layout level (which requires drawing *lots* of multi-coloured polygons). [Jargon File]