I just got this in "strengthen skills" on the web. The English is incorrect: it should be "Cats do not wear socks" (or don't).
isn't it suppose to be "cats don't" instead of "cats doesn't"?
That's correct. I reported it.
What does גורבים גרביים actually mean? It seems like an odd construction to me.
It means "wear socks". It can mean both the act of putting on, or having socks on. Hebrew has several different words for wearing different items: חובשים כובעים, נועלים נעליים, עונדים תכשיטים, מרכיבים משקפיים, חוגרים חגורות.