An unattractive girl, who when in a nightclub suddenly becomes extremely popular, amoungst males, at around ten to two (ten mins before the club is due to shut)
From a popular song by Pearl Bailey in the early 1950's.
A dishonest, shady person, or scam artist who has found his mate, who complements each other's undesireable behaviour.
Don't blame him only for cheating the old woman out of her money, his wife helped. It takes two to tango.