Several blues and rock songs refer to “big-legged” women, like Led Zeppelin’s “Black Dog”:
I don’t know, but I’ve been told
A big-legged woman ain’t got no soul
and Albert King’s “Born Under a Bad Sign”:
You know wine and women is all I crave
A big-legged woman gonna carry me to my grave
According to a discussion on the Straight Dope forum, this bit of imagery dates at least to the 1930s or ’40s, but the exact origin and meaning are unclear.
Does “big-legged” have a specific connotation or euphemistic meaning? Blues songs often use it to mean an attractive but no-good woman – but then, blues songs often refer to all women as attractive but no good, so that could be a coincidence. Does the term have a specific origin?