A person who does not see another person as a romantic or sexual partner until they become unavailable. Who then tries to steal them away no matter what.
Brent: Man I didn't realize how hot Tiffany was until she started dating Mike. I think I need to get her back to my place.
Dave: Dude you are such a kleptoromantic, just leave it be.
Dave: Dude you are such a kleptoromantic, just leave it be.
by FreeshAvocadoo July 30, 2019