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?
Trent: Yeah bro, I’ve been Judi-Denching for my girl since spring break.
To bestow an abundance of unsolicited attention onto an individual under the influence of alcohol in the pursuit of sexual gratification. Derives from the name of the main character in children’s animation Arthur Christmas.