END OF ONE'S TETHER

{n. phr.}, {informal} The end of your trying or imagining; the last of your ability, or ideas of how to do more. * /Frank was out of work and broke, and he was at the end of his rope./ * /The doctor saw that Mother had reached the end of her tether, and told us to send her away for a holiday./ Compare: AT ONE'S WIT'S END, FED UP, UP AGAINST IT, UP A TREE.