Dirty Cecilia 

The act of reviving a thumb in the butt then squeezing so hard you dislocate your partners thumb

The unicorn gave cookie a dirty Cecilia

Dirty Cecilia by Littlebig jeff March 8, 2019

Dirty Cecelia 

The act of shoving a whiteclaw up your asshole while screaming fuck me daddy and listening to Dixieland Delight.

Person 1: "What the fuck is wrong with that dude over there?"
Person 2: " IDK man, looks like he's going through a Dirty Cecelia right now."

Dirty Cecelia by pineapple34 April 12, 2020