lazy bed

noun

(in parts of Scotland and Ireland, formerly) a patch in which potatoes were cultivated by laying them on the surface and covering them with kelp and with soil from a trench on either side of the bed

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012