Pulling a Nocte
A male person that makes people go "HJXJSNDJSKSSM" by dating someone (usually his rival or arch nemesis)'s hot sister.
"Did you hear the tea about Ross?"
"Yeah, I heard that he went and started dating Bob's sister."
"There he goes, Pulling a Nocte."
"Yeah, I heard that he went and started dating Bob's sister."
"There he goes, Pulling a Nocte."