A bogle, boggle, or bogill is a Northumbrian, [ 1] Cumbrian [ 2] and Scots term for a ghost or folkloric being, [ 3] used for a variety of related folkloric creatures including Shellycoats, [ 4] Barghests, [ 4] Brags, [ 4] the Hedley Kow [ 1][ 5] and even giants such as those associated with Cobb's Causeway [ 5] (also known as "ettins", "yetuns" or "yotuns" in Northumberland and "Etenes", "Yttins" or "Ytenes" in the South and South West). [ 5][ 6] They are reputed to live for the simple purpose of perplexing mankind, rather than seriously harming or serving them.