What did the Cosby show mean "All for one, one for all three for five?"?

It's a play on words. The first time I saw it was on The Cosby show. Read "Three FOUR Five" instead of "Three for Five" and you see the little joke they were making. It works on a couple of levels, not just the pun, but also mixes in a little sports style cliche along with the Three musketeers quote.