have a leg to stand on

mít se o co opřít, mít oporu

Mr. Habsburg may not have a throne to sit on; he does have a leg to stand on.

If you're cohabiting and the man leaves you, you haven't got a leg to stand on. He has no financial obligation towards you, unless you go to a lot of trouble to prove otherwise, and that could take years.

When it comes to complaining about EC centralism the UK Government hasn't a leg to stand on. We in Wales know it is the most centralist government in Europe . (BNC-B)

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