And I've heard it called "immoral" or sometimes "illicit."
April Blum
In a message dated 8/2/2010 3:36:43 P.M. Eastern Daylight Time,
callers-request(a)sharedweight.net writes:
Luke asked:
If the 1s and the 2s cross? I'd be inclined towards anti-proper or
maybe improper-indecent (a mouthful). This was the question that
prompted the query.
So from the stage, all the men are on the left and all the ladies on the
right? In keeping with the improper and indecent themes, I've heard this
formation referred to as "downright scandalous." But it may have been more
for the schtick than the etymology.
--Jerome