Much akin to the Dirty Sanchez, a time honored event in which, while laying the bone doggy-style you insert a finger in her starfish, pull it out and wipe it across her upper lip, leaving a thin moustache. At the same time you pull her hair tightly back from her forehead, making her look like Erroll Flynn!
"I turned Dixie into Erroll Flynn last night."
Someone who bangs their in-laws relatives.
My friends tried to accuse me of being a flynn for banging my brother in laws step sister but I always say if she's not blood then it's all fair game.
A boy with a red tip on his shlong
"Have you seen him?"
"He has a dirty Flynn"