I suppose I don't need to say that-despite the similarities in spelling and sound-I absolutely don't think that the children's cheer "Gigalo"/"Jigalo" has anything to do with the disparaging refernts for Black people "Jig" and "Jigaboo".

If I were a betting woman-which I'm not-I'd bet the farm {which I don't have} that Gigalo/Jigalo has nothing to do with those words.

One reason why I'm so certain of this is that I don't think that those those disparaging referents are not that widely known.
I mean I'm almost as old as the hills and I've never heard these words spoken by anyone Black, White or Green except in the 1988 Spike Lee movie http://en.wikipedia.org/wiki/School_Daze and except for that now infamous segment on the Don Imus radio/tv show in which Imus and his producer joked about the physical appearance of Black female basketball players and called them hos, jigaboos, and grizzlies.

When Imus' advertisers took a walk, he was fired from that radio/tv show. 'Nuff said.

Yeah. I'm 99.9% certain that Gigalo didn't come from Jigaboo.

Why am I so sure? Because I wanna be, that's why.