To lift one’s leg in the air, like a cat, and reveal one’s butthole. Often done spontaneously and to surprise others. Requires flexibility to lift one’s leg nearly vertically. See film Cats (2019) for reference.
Girl to friend: Can you believe Britney?! She just Judi-Denched herself and then kissed her boyfriend. Iconic.
Chad: Bro, I met this girl on Tinder that wants to watch me Dench. Should I go for it?
If you have a very large meeting that is critical for technical expertise from a key individual - minimum of $400m of potential business; and the key technical resource decides to not show up nor tell anyone...and flys to Europe.
We got totally dulchinosed on the last deal with our big customer.