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3. on last legs

on last legs

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on someone's (or something's) last legs

Fig. for someone or something to be almost worn out or finished. This building is on its last legs. It should be torn down. I feel as if I'm on my last legs. I'm really tired.

See also: last, leg, on

on (one's) last legs

At the end of one's strength or resources; ready to collapse, fail, or die.

See also: last, leg, on