Green’s Dictionary of Slang

1. (Ulster) a fat stomach [it is evidence of one’s idleness].

1996

C.I. Macafee Concise Ulster Dict.

2. (Scot.) unemployment.

1935

(con. 1920s) McArthur & Long No Mean City 105: I’m one of the lucky ones, too, that doesn’t know what idle set (unemployment) is.