I.e., “the gate of casting out,” hence supposed to be the refuse gate; one of the gates of the house of the Lord, “by the causeway of the going up” i.e., the causeway rising up from the Tyropoeon valley = valley of the cheesemakers (1 Chr. 26:16).
Easton’s Bible Dictionary
Shallecheth, The gate of
Easton’s Bible Dictionary (1897), public domain. Text via Theographic Bible Metadata, CC BY-SA 4.0.