if/when all else fails

idiom

Definition of if/when all else fails

: if/when everything else one has attempted has failed He only bothers to read the directions if/when all else fails.

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“If/when all else fails.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/if%2Fwhen%20all%20else%20fails. Accessed 29 Nov. 2020.

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