Derives from the obvious acronym "S the D", i.e. "suck the dick"
Girl 2: Yeaa I seized the day!
Girl 1: YOU GO GIRL!
Girl 1: I don't know if should hook up with him or not! Should I do it?
Girl 2: Yes do it!! Carpe diem!
Girl 1: You're right! I have to seize the day!
Guy 1: Dude did she seize the day?!
Guy 2: Hell yes she did!
Guy 1: YOO MY MANN *bro hug*
A Slut: NOW IS THE TIME TO SEIZE THE DAY!