The name given in Scotland to a strip of land, or the corner of a field, left untilled. It is a popular superstition that unless some such place is left, the Spirit of Evil will damage the crop.--Edwin Radford's Encyclopedia of Phrases and Origins, 1945
On the first Monday after Christmas holidays it was customary for farm laborers, or plough-stots, sometimes dressed in white and adorned with flowers and ribbons, to raise plough-money for drinking revelries. In Rustic Speech and Folklore (1914), E. M. Wright remarked, "Among them were usually two special characters, the Fool, and a man dressed up showy female costume called the Bessy; but in some places, there were two, and even four female characters with such names as Sweet Sis, Old Joan, Maid Marian, or collectively named Bessybabs, Ladymadams, Queens. This troupe performed some kind of morris-dance or sword-dance, and collected money from the onlookers."
<deep voice> But they were totally butch and not at all a bunch of whoopsies, honestly. </deep voice>
Re: "goodman's croft", what do you want to bet that started out as the fairly straightforward practice of leaving part of the field fallow to avoid overplowing, and got corrupted into pseudoreligious gobbledegook by later generations?