A guy who takes many "loads" orally or anal and holds them inside themselves.
Jordan: "man I've been feeling really sick this week"
Alex: " it's cause all you've done is be a seman septic"
Jordan: "it's only ten loads!"
Alex: "....seman septic"
A girl/guy who is on a mission to get laid by any means necessary
Guy 1: Hey I think you have a good chance getting with Rebecca tonight
Guy 2: What makes you think that?
Guy 1: She is scheming for seman bro, she will get with anyone
A person who drinks their own seman
Bob was so turned on he became a seman drinker.