What was the popular musky perfume oil that the "hippies" used a lot

A truly vile, overpowering, oil.


https://en.wikipedia.org/wiki/Patchouli


It was thought to mask the smell of being unwashed, etc.

I think it was more to mask the etc - being unwashed isn't illegal.....

Here's the whole "Aging Hippy" line:

Get back in the groove with Aging Hippie! A musky, spicy, sensual scent known for helping you feel comfortable, peaceful, safe, and grounded. Made with patchouli essential oil ~ that groovy scent from the 60's. Common skin care uses ~ natural antiseptic, acne, athlete's foot, cracked and chapped skin, dermatitis, eczema, wounds, and wrinkles. We just had to name this one Aging Hippie!

http://www.mountaincountrysoap.com/aginghippie.html

it was Patchouli I was looking for