Maddy Parkin Share definition Flag The sluttiest of sluts. Dirtier than a hooker's vagina. No matter where you hide your boyfriend, she WILL find him. BEWARE of the Maddy Parkin. She's hooked up with 8 guys in a week, she's such a Maddy Parkin. Maddy Parkin by fourloko69 June 30, 2014 Get the Maddy Parkin mug.