a faux pas
A faux pas literally means "wrong step" in French.
You could just use the term "fuck things up" instead, but if you wanna look classy, use "faux pas".
Synonyms for a faux pas
On this page, you will find 30 slang terms related to a faux pas. Some of the top words include: noun, faboo, Irony, fcuk, dumas, and 25 more.