0 a simple style of sandal (= light shoe for warm weather) consisting of two leather straps that go across the top of the foot and sometimes a strap around the heel (= the back of the foot), fixed to a flat bottom part usually made from natural materials:
"You should wear something comfortable, like Jesus sandals." -- "Oh Mother. I'm not wearing those."
Environment-friendly cars are for tree-huggers who wear Jesus sandals, he says.
I've never heard of Birkenstocks, and I don't wear Jesus sandals. I tend to wear nice handmade shoes.