Jens-Marius Share definition Flag Jens-Marius is a man who is very nice, and a complete gentleman. He is often defeated in arguments. He drives a red car, and like beavers. That guy is such a Jens-Marius.You're such a douche, why can't you be more of a Jens-Marius. Jens-Marius by Idvi July 29, 2012 Get the Jens-Marius mug.