Screw up
Screw up verb - To make a mistake.
Both terms in one sentence
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Mork decides he doesn't want to undo the year he's had with Mindy and that if anyone's going to screw up her life, it should be him.
Source: It's a Wonderful Plot - It has more to do with the Prince's new companion being capable of exactly the same acrobatics as the Prince, as well as having access to powerful magic, which is the mechanism you are rescued with when you screw up, along with the plot critical powers needed to undo the corruption.
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The game originally had a Nonstandard Game Over happen if you manage to screw up the timeline so much that you can't undo the changes (via an extremely powerful time ripple that destroys your XTM), but then they realized that this can never happen in a game about time travel and removed the option.
Source: Timey-Wimey Ball
Cite this Source
Undo and Screw up. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/screw_up/undo
Screw up & Undo. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/screw_up/undo>.
Undo or Screw up. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/screw_up/undo.
Google Ngram Viewer shows how "screw up" and "undo" have occurred on timeline