Haha, different meaning of the word. Referring to “chaps” the clothing item from the Western part of the U.S., not to folks who don’t have an ass. Chaps were made of leather and worn over jeans to protect to protect the inside seam area of them from excess wear from rubbing against the side of the saddle and the stirrup straps when spending a long time riding a horse. Or are sometimes worn without the jeans by men being lewd.