{adj. phr.} Failing; near the end. * /The blacksmith's business is on its last legs./ * /The dog is old and sick. He is on his last legs./ Compare: ONE FOOT IN THE GRAVE, ON ONE'S KNEES(2).
ON ONE'S LAST LEGS
Meaning of ON ONE'S LAST LEGS in English
Dictionary of English idioms . Словарь английских идиом. 2012