Posted on June 18, 2017November 8, 2017 by Idioms Poster When your chips are against the wall Mix up of : When your back is against the wall, and When the chips are down. From Ed, Highams Park, London UK. Products and Mixed IdiomsBuy now: WHEN YOUR CHIPS ARE AGAINST THE WALL – Short-Sleeve Unisex T-Shirt Post navigationPrevious post: Silent as a lambNext post: You are preaching to the convertible