Neglecting one's work from foolish merriment. This may be from the same root with Swedish gafl-ning, a giddy or wanton person. In a sense nearly allied, young women are said to be gamflin with young men when they pass their time in frolicsome discourse, or in romping with them. It may be allied, however, to Swedish gaffla, to laugh aloud or immoderately.
(From John Jamieson's Etymological Scottish Dictionary, 1808)