Put this in the "You've got to be kidding" category

[Zen]

I believe (this is not a research-based belief, just a personal one) that the "tramp-stamp" label evolved because of the ridiculous fashion of hipster jeans, short tops to allow exposed midriffs, specially designed g-strings to be seen above the hipsters... That says tramp if nothing does (and I'm no prude). add a tattoo to the mix and I understand how the name evolved.

Look at the time-line of those trends. It seems they somehow simultaneously evolved.