Skank is a steady-paced dance performed to reggae music or -- in American slang -- a decidedly disreputable person.
It is quite common to make a sound-alike nonsense of the original word as a way to disparage it
Skanky-manky : meaning "so you are dancing around this, it doesn't change the fact you have to face it."
Or : "So this friend is a skank, makes no difference if you like her."
Or : "This is an off-kilter proposition so what difference does that make to what has to be done." Skanky-manky!
Those on this board with better poetic talents could probably give you more examples in this interpretation ... irreneverthelessgardless it is one meaning I am familiar with.
Any other info out there?
wow