atworst If all goes wrong Under truly awful circumstances Least optimally If everything goes as badly as possible Under the least favorable circumstances Most unfavorably In the most dire circumstance In the least favorable case If everything else fails If all goes awry If everything goes wrong: 2 wds Pessimist's hypothetical If all else fails Least favorably On one extreme If everything fails miserably Least desirably "If all else fails ..." A number on side street taking the most negative view Taking the most negative view possible