Blind vs. Blind Play?

I've heard the expression by poker commentators of "blind vs. blind" play; this seems to refer to small blind vs. big blind play. But there is seems to be something more to it than that; can folks elaborate on what this means?

That is it, just the blinds playing against each other. The differences come in with the cards that are played because it is just the two of you against each other and priced in by posting the blinds the cards being played will be much 'looser' than you would otherwise expect.