Idiom idiom
louse up
Meaning
To mess up; to confuse; to put into a state of disorder.
Meaning adapted from Wiktionary, available under CC BY-SA 4.0.
Examples
“I did not mean to louse up your plans.”
“The waiter was so distracted that he managed to louse up our entire dinner order.”
“Despite his careful preparation, a single technical error threatened to louse up the entire presentation before the board of directors.”
Anchors to
Last updated August 10, 2026